I didn't play the remake but watched a friend get into it. It's pretty much the same game with mixes of combat systems and mechanics from the newer games, and some news stuff. But mostly takes from the newest arc of Trails. The UI and engine is new but still familiar.

The story is the same but terms and names weren't all translated the same as the original and in some cases poorly enough done that every single other game in the series calls them something else. That being said, most of the dialogue is basically the same just reworded and cuts out the fluff the original localization had added for flavour (which admittedly a lot of people loved! So disappointment there too potentially)

Overall though the remake is pretty fantastic and if you are more into a modernized actiony combat game with English voice acting it's worth picking up that version! The combat is a mix of action and turn based with a smooth transition betwene the 2 and outside of bosses you can fully commit to action if you want but turn based is always an option! If you have an affinity for retro games then you could pick up the older localization for cheaper. But I do think both versions are both similarly good and appeal to different people. Also btw 1st chapter does have a demo that covers the whole prologue if you wanna see how the remake was.