"PlayStation 2, PlayStation 3, PlayStation 4 and PlayStation 5 games on PlayStation Now can be streamed to PlayStation 4, PlayStation 5 and PC. As of 2020, there are over 800 games available, with over 300 of them available for download to PlayStation 4 and PlayStation 5."
"Xbox Games Pass gives you access to more than 200 games to download and play on your Xbox One for one monthly fee. It will also be available on Xbox Series X and Xbox Series S from 10 November 2020 - their release date"
Not much, I don't think. And honestly, people have been pushing GamePass for so long and praising it as the best deal in gaming for ages...but I never saw much value in it so I never really looked into it. However, out of curiosity I decided to google and see how many games were on GamePass vs PSNow (Similar but not identical services) and just facepalmed. Even if you just factor in the games that can be downloaded, it's still about 50% more on PSnow. I still have no interest in either one, I just find it funny that Xbox and their diehards have all been pushing GamePass as the ultimate deal in Gaming, while Sony has been doing something similar for years and nobody gave a shit. IT's only a big deal because Xbox says it's a big deal, just like all their misuses of the word 'exclusive'.