It's clearly more powerful than PS360. 6x the usable RAM, better GPU, more modern architecture, ability to use current-gen effects and engines. Even in portable mode it's simply better tech.
Comparing games is a little trickier. Skyrim is a big step up on Switch from last gen in every way and is based on the current-gen version. Doom may look like crap on Switch, but it's the same game as the PS4 and XB1 version, just with downgrades, and it would never run on the PS360 without being rebuilt from scratch using a less advanced engine. Games like Fast RMX use modern techniques you wouldn't see on PS360. And Switch games in general hit higher resolution and framerate targets than last gen did.
Comparing things like polycounts and texture resolutions is a little tricky, as for one game the focus may be on the polygons, in another its the textures and shaders, in another the lighting, and in yet another its the physics. Samus in Metroid Prime 3 Corruption had a much higher poly model than any of the character models in Half Life 2 or Final Fantasy 13, about double the polygons of their main characters, but no one would call the graphics of Prime 3 more advanced than in those games, because they excelled in other areas.







