I’m way worse framerates, battery life overall performance with GTA 4. I really didn’t expect this as GTA 5 ran an extremely stable 60 FPS and only 10 watt battery drain. Even with the explosive bullets cheat and 5 stars not once did I see a frame drop. With 4 though, I had to drop it to 40 fps and still encounter occasional freezing with medium settings.
Same, the smoothest experience of gta iv i got from steam deck. My main pc is i9 9900k with 2080ti and its not that stable as on steamdeck xD