Hmmm. Not too many diffs, not too much new stuff between 4 and 5. But if you’re into LMDE, why not upgrade just for the heck of it?
Just for clarification: I propagate Linux Mint because it’s an amazing distro for everybody. I’m not using it myself since I’ve found something even amazingerer. But if I did, I’d be using the LMDE version of it. Ok?