In general, most find that the higher draw wts result in "crisper" releases. However, If you have the patience to work on your release until it becomes smooth and consistent with a 'lighter' draw wt, it will likely only get better with heavier draw wts.
Most of us, myself included, actually "let go" of the string rather than "relaxing" the fingers and allowing the string to 'knock' the relaxed fingers out of the way. The fact that our release improves with higher draw wts is indicative of our "release" technique, or "lack there of".
Only you can decide if you want to spend the time at close distance on a blank bale focusing on your release with your eyes closed until you can get equally smooth releases with both light and heavy draw wt bows. Most of us find that to be boring work; and we're anxious to just get out and have fun flinging arrows and letting time, trial and error, and repeated activity slowly make our form "consistent". Consistency, after all, is really what archery is all about. It's not necessarily what's "right or wrong".
Whatever you decide, above all, keep it fun!