LHP v. RHP Comparison Question

I notice that when I throw lefty, my arm action is a bit longer and my wrist, when it gets to the top, sits back (third frame, right).

Does laying your wrist back like that affect the delivery and the resulting ball? I’ve tried to get rid of that when throwing lefty but it seems to be an unconscious thing. I hope it’s not bad. If anyone can give feedback, I’d appreciate it. Thanks^^

(I will post video when I can, but internet connection is too slow to post atm…)