Y3 on ps3 vs remastered on ps4/pc

I don't mind jank and would be totally into playing on an older console - so that isn't a question here.

I am just trying to figure out which game is more content complete. I read a lot of about K3 dropping stories but are Y3 for ps3 and Y3 remastered the same content?

My preference is to the play the original game on the original console *if* they have the same content (in part cause I have the disc already, but also cause I like playing on original systems) but I am wondering if I would be missing a lot of content if I did so.

Also are there significant QoL improvements with the remaster, or just upgraded graphics.

I see a lot of posts about Y3 remaster vs K3 but not a lot asking about Y3 OG vs Y3 Remastered so its not really clear what the differences are