Yeah, pretty much everything is the same. It's a good game. $60 is a bit much for something so close to 1:1, would have gone $40 myself. It looks like how we remember Mario RPG looking and it's been a really fun jaunt. I recommend it if one has money to kill and loves the game.
They did add some new stuff, like some pretty nice cutscenes, triple techs, being able to rotate characters in and out of fights, and 7 new super-bosses that are all superior to Culex.
Also Geno/Bowser/Mallow all got new super weapons that are equivalent to Mario's Lazy Shell or Toadstool's Frying Pan. So everyone now has an "epic" which is nice. Mallow's is kind of weak, but Geno gets a damn laser beam and Bowser's is particularly strong. Unfortunately Bowser's weapon requires defeating probably the most annoying new superboss.
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Status effects work on a bunch of the new bosses, so I'm using Mute and Sleepy Time for like the first time ever in this game. Poison also does a huge number on a couple of them.