GTA V and BOTW can't be directly compared. GTA V's open world is filled with NPC's, buildings and traffic, something that BOTW doesn't have. Also BOTW has cel shaded graphics so a lot less details are required for it. Both have impressive physics, but PS3's CPU has more powerful and higher clocked individual cores than PS4, so it should handle BOTW's physics. BOTW is better in terms of framerate than last gen GTA V, that's the only place its better.
Also GOW 3 can run on PS3 at 45-60fps so BOTW would run on it easily. GOW 3 had incredible scale to it, some of the bosses were bigger than entire levels in some other games. Not open world, but as they are all animated that makes it more impressive and it still looks like a PS4 game on PS3.







