While neither are perfect, I will prefer to buy an AMD GPU because I find their business practices much more palatable than Nvidia's. The performance difference at my price point would have to be pretty large for me to even consider a Nvidia card.
Please remember that any mention of competitors, hinting at competitors or offering to provide details of competitors will result in an account suspension. The full rules can be found under the 'Terms and Rules' link in the bottom right corner of your screen. Just don't mention competitors in any way, shape or form and you'll be OK.
Will be looking to upgrade in this cycle. I’ve been holding on to see what the best price / performance card is to replace my 980ti as it’s going to struggle at 1440p.
The best bang for buck @ 3440x1440p will be getting my £££
Likewise I now face the interesting prospect of trying to run 1440p on a 970. May look at an interim card until new gpus.
I had a kind of a similar issue after selling my rtx 2080ti, making a 2060 super run at 4k, I got it working pretty nicely on most games, one thing that really helped for me , was to set the Hz in the nvidia control panel to 50HZ, as I could get most games to work nicely at around 50 FPS with mostly high settings, without doing that, I found the FPS bouncing between 50 and upto 60 FPS to much to bear, but 50hz keeps a nice smooth FPS that looks pretty close to 60HZ with High detail settings....so it might work well for you at 1440p at 50hz.