Thanks for this, I'm thinking of getting the CQP, as I don't think the Alienware is worth the extra, and I prefer the MSI to the Gigabyte's, which are also more expensive. I came to the same conclusion you have re: the CQPX, the 240HZ is probably not worth another £200, as an AMD user I like that both comes with AMD Freesync Premium Pro.
I game in the dark, so I think glossy panel sounds like it would be ideal for me. I'm currently on a 32" 4K IPS, and tbh I don't think the resolution is worth the FPS hit, definitely not when put against a 1440p UW OLED, and all those advantages it has. That's my feeling right now anway.
No worries. Yeh that's my view 175Hz is plenty and save the £250.00. If you are gaming in dark then no issues for you ref the glossy screen. Perhaps if you're used to 32" 4K then the sharpness/clarity might not be as good because pixel density is less on the 34" ultra-wides. I'm happy with what I see, but I've not used a 4k 32" so sadly can't offer comparison in that regard.