GameWorks and Freestyle vs AMD alternatives?

[Altonu]

So, tomorrow (28 Oct 2020) is supposed to be AMDs announcement of their next GPUs, and I'm waiting to see what they have to offer before making upgrade plans, but I have not used a Radeon GPU since before they were purchased by AMD, so I want to get a better picture of the pros and cons of each brand beyond raw performance.

The cost and performance of the 3070 seem like it would be a good fit, but if AMD offers competion witn more VRAM (8GB may be fine for 1440p now, but I'm apprehensive about 2-3 years from now) or simply better cost/performance value, I could change my mind and give them a try.

My current GPU is a GTX 670 4GB, so I have not actually been able to benefit from GameWorks or Freestyle, but they both sound like good reasons to stick with Nvida, but I know AND has open source equivalents to at least some of the GameWorks features. What I don't know is how well supported those are and if the image quality is equivalent or different.

I am particularly interested in if AMD has an equivalent to Nvidia Freestyle since I am a moderate proton (colorblind), so that sounds like a realy enticing feature (colorblind filters for games that don't otherwise offer colorblind settings).

Thanks for any insights on these topics.