Switching from a longer ester to a shorter ester is fine, it's still the same substance doesn't matter what ester is at the end. The problem arises when switching from a shorter ester to a longer one, to make the transition go smoothly you would have to continue taking your shorter ester a long with the longer one your about to switch too until the longer one kicks in, usually a few short weeks.

But in your case it's fine switching to a shorter one. I too notice less bloat in shorter esters.