TTYD is my favorite Mario RPG ever made....Super Mario RPG is dead last (yes below the two Mario > Luigi games I've played, those being the first two). It's fun enough, but I didn't find it to be anything special without nostalgia. I also played FFVI for the first time right before it and loved it to pieces, so that one didn't need nostalgia.
I'm worried newcomers to both games will play SMRPG first and then think "yeah that was fine, guess I can skip TTYD" and they really shouldn't :(
Welcome to your Divinity.