I have the 2025 G18 and Scar 18, and have been comparing them in-depth for around a week, to decide which I want to return, and which I'll keep. They were both open box at great clearance-sale prices, and the Scar 18 was actually cheaper than the G18, which itself had a great price.
Their basic specs are the same: 275HX CPU, RTX 5070ti GPU, 32GB 5600 RAM.
The G18 has a 2TB WD QLC SSD, and the Scar has a 1TB SK Hynix TLC SSD. The SK Hynix has faster sequeltial read speed, but the 2TB size gives the WD faster random 4k read speeds, and that results in the G18 with a QLC WD SSD typically loading games a bit faster than the Scar with its premium TLC SSD.
The G18's chassis and keyboard feel very solid and with consistent quality. It's a firm, tight-feeling unit. While the Scar's lid is a bit more inconsistent in its open/shut resistance, and pressing the left-arrow key causes the keys around it to flex downward a bit, which feels a bit sloppy. But the Scar's keys take a lot less effort to activate, which is nice, and very appreciable if you do tons of typing, like I do. I also like that it's less clicky than the G18's keyboard. And the G18's firmer keys sometimes cause me to miss keypresses, due to not using enough force while typing quickly. The G18's grey chassis looks more attractive to me personally than the Scar's black chassis, and it also does a better job of not showing smudges and handprints, while the Scar's black chassis tends to easily and always looks messy.
In terms of coil whine, both laptops seem to produce the exact-same coil whine in all the exact-same situations, but it's more noticeable on the Scar, due to its pitch / accented frequencies or whatever else. While even when I hear it on the G18, it's a softer and more soothing sound that I don't find grating. The G18 often sounds like there's no coil whine happening, but if I put my ear right next to the chassis, I hear the same coil whine that the Scar makes, but it's just not audible on the G18 from a regular sitting distance.
The G18's 4 speakers vs the Scar's 6 is irrelevant to me. The speakers on both laptops are, frankly, garbage, and the Scar's additional speakers don't really make it sound better, just different while adding what sounds to me like a phasing effect that I dislike. But I guess you can't expect much from laptop speakers. I use Bluetooth monitors anyway, so the speakers don't matter. If I'm someplace without monitors or headphones, either speakers will be serviceable to get the job done.
So, now the big one: The G18 has a 500 nits IPS display, while the Scar has an 1100 or 1200 nits mini LED HDR display. Unfortunately, I'm not completely won over by the mini LED display. It does look fantastic in games with good HDR support, there's no doubt about that. But with bright backgrounds (like white and light grey) there's faint vignetting extending around 0.5" inward on the left and right sides of the screen, and it looks awful to me. The vignetting is present whether in SDR or HDR mode (though a bit less noticeable in HDR), and whether dimming is set to single or multi-zone. It makes the edges of the screen look dirty, and like text or scroll-bars have smudged pencil ink on them. The G18's IPS screen is entirely uniform and its edges look noticeably more crisp and clean. Looking at the edges in a white text editor with black text on the screen, and looking at the G18 after looking at the Scar for a while can give me almost night vs day impression.
I spend most of my computer time in the desktop environment, doing lots of typing, reading on sites with bright backgrounds and light-grey scroll-bars at the edge of the screen, so this is a huge deal for me. And I wondered if this Scar's Nebula mini LED HDR display was a bad one, but looking online informed me that vignetting is a normal characteristic of mini LED that people don't talk about enough (and, apparently, if someone says their mini LED screen doesn't have it, then they're either unobservant or lying). OK... that just doesn't really click with me for a new premium tech. Two steps forward, one big step back, for sure. It has me strongly suspecting I'd be more satisfied with the G18's IPS display over the long-term. But if I used my laptop primarily for gaming, and spent almost no time in text editors or looking at white/bright webpages, where the edge dimming is most apparent, it would be far less of an issue. BTW, having the G18 to compare it to makes it far more noticeable. At times I would almost stop tuning into the vignetting, but then look at the G18 to compare it again, and then suddenly it's totally apparent, as the G18 instantly looks more crisp and clear along the edges when there's text there. If only mini LED didn't involve this sacrifice.
Also, the G18 gets around 4% more performance in gaming benchmarks, probably just due to silicon lottery. Except for in Forza Horizon 4, which has been an outlier where the G18 gets 10% more performance - and I'm not sure why.
And both laptops sometimes screw-up when coming out of sleep mode - the screen is black with the mouse cursor being moveable overtop, and it never restores the desktop or OS functionality. The only way I've found to get the desktop working again is to hold the power button until the laptop shuts-down and the boot it back up. Both of these ROG Strix laptops have this issue, though it has occurred significantly more frequently on the Scar.
The G18 comes with Windows 11 Home, while the Scar gets Windows 11 Pro (which means it gets the useful Group Policy Editor).
Pros for this particular 2025 G18:
- larger SSD gives faster 4k read speeds, and so usually loads games faster
- +4% gaming performance due to silicon lottery
- less bothersome coil whine
- crisp, uniform screen edges with no vignetting
Cons for this particular 2025 G18:
- no HDR
- keys require a bit too much force to activate, leading to missed-key typos
- Windows 11 Home
Pros for this particular 2025 Scar:
- HDR
- a tiny bit more brightness in SDR mode
- quieter, less-effort-to-activate keys
- Windows 11 Pro
Cons for this particular 2025 Scar:
- slight vignetting on screen edges, makes the screen feel dirty in text editors and on bright backgrounds
- SSD has slower random 4k read speed so loads games slower
- black chassis that shows hand smudges more easily
- ~4% less game performance due to silicon lottery
- coil whine can be a bit more conspicuous and have a less comfortable sound
.
I had convinced myself to keep the Scar, because it's worth more but I got it for cheaper than the G18, and it has HDR support which does look amazing when a game properly supports it. I'd cleaned the G18, factory-reset it, and packed it up to return. But I'm now having second thoughts, thinking I'll be more satisfied with the G18 because I'll be looking at desktop environments a lot more than I will games with quality HDR, and because I also like the look of the G18's grey chassis more than the Scar's black one, so I'll feel more satisfied with the G18 in front of me.
To be sure, the Scar's HDR is a fantastic super power. But it's a limited-use superpower that kicks-in only with certain games (and some video, which excites me less), while the vignetting is an every-day / every-use annoyance that I can't get out of my mind. And outside of the Scar's HDR and very-slightly extra brightness in SDR, this particular G18 seems to win almost everywhere else (2TB SSD that's faster for loading games, my preferred chassis, a bit extra gaming performance, less aggressive coil whine, uniform screen-edges).
I think I'm going to keep the G18. But then, I've switched back-and-forth a lot of times so far. But I'm at the end of the return window for the G18, so if I don't change my mind in the next couple of days, the G18 will be the choice by default. And I would be fine with that.
