Just finished comparing the TN & IPS rogs.
At their highest refresh rates 144 vs 165 on witcher 3 getting 130fps with g-sync on. The IPS one has a nicer image due to lack of vertical gamma shift and thus the colours are rich across the whole screen and the lack of a grainy coating makes it look nicer. It has zero overshoot issues whereas the TN one has overshoot, especially noticable on the clouds in the sky. As far as blur goes on really fast pans the TN is slightly better but not to the extent of being a plus as overshoot is annoying. Best way to think of it is turning down monitor overdrive to lose overshoot and gain a tiny bit more blur. The input lag and response feels smooth and nice on both.
For reference my TN rog had perfect greyscale, colours and nice gamma after calibration and no backlight bleed. Although I have not calibrated my IPS one yet i can tell it looks accurate enough for comparison for now.
When using ULMB the TN rog still has overshoot which is annoying on the clouds on witcher 3 at 85hz or 120hz. Their are odd light ghosting bits as well. The IPS rog has much less overshoot but has a few more ghosting issues response time related as well on games. They both look pretty much blur free at 85hz which is easier to maintain 85fps across the whole of a game using v-sync. Due to each having seperate issues to slightly moan about I would call ULMB mode a draw.
I tried the PS4 and a 1080p sharpness test pattern and the scaling is of medium quality for me. Their is slight ringing on the test pattern and is not the best scaling i have seen for 1080p, an old iiyama 1440p was better. It's not really bad though and distance and your own expectations play a big part here. For me personally it's a little disappointing. Seen as the TN rog had no hdmi then this can only be seen as an advantage for most people.
The menus are just as responsive etc as the TN rog and have the same picture calibration options and overdrive off, medium and high. The joystick, buttons, including hz changing button are the same kind of layout.
If i had a choice i would get the IPS rog with it's only issues being the silvery IPS glow only visible on the right hand side of the panel in the corners as it's dark blue glow on the left and is not noticable. This is from a few ft back. Mine has very very minor BLB in the top right and bottom right corners but the silver glow hides it anyway. Also the slight response related ghosting in ULMB mode on certain transitions. Other than that it's great.
The TN rog issues would be overshoot in both normal and ULMB modes. The TN vertical gamma shift. Lack of hdmi for consoles (if needed) and slight ULMB light ghosting and the grainy panel coating.
For me the IPS rog wins as their are not that many games with dark scenes compared to bright and that is it's biggest issue and you can always dim the backlight and dim the image even more using ULMB.
