Came from a 6S and have zero regrets. My only wish after seeing them in-store is that I'd have gone with the silver over rose gold. My screen is warmer than my 6S was but honestly I don't think I'd have noticed had I not put them side by side for a size comparison.
I've noticed the screen being warmer in 5SE as well, compared to my 5s, it's quite noticeable actually.