FSR that works on those cards isn’t “AI” upscaling, just spatial. Only the upcoming FSR4 is “AI” powered, and it requires dedicated “AI” hardware like DLSS does.
Also just because 2 games use the same engine it doesn’t mean they will run even relatively at the same level. It all depends on what features of the engine it’s using, at what level, what customisations they’ve made, what genre the game is, what the scope of the game is, etc.
FSR that works on those cards isn’t “AI” upscaling, just spatial. Only the upcoming FSR4 is “AI” powered, and it requires dedicated “AI” hardware like DLSS does.
Also just because 2 games use the same engine it doesn’t mean they will run even relatively at the same level. It all depends on what features of the engine it’s using, at what level, what customisations they’ve made, what genre the game is, what the scope of the game is, etc.