I just did another round in the pool last night with my quattros and my friend's Jets. I still don't see a difference for the most part. My Fundies ocean dives are this weekend, so I'll have more info after that.
It's strange trying to do the backward kick in the pool - I'm equally bad in both sets of fins. The strange part is I was doing a great backward kick a few weeks ago in Cozumel, holding myself against the current while taking photos, but now I can't do it to save my life. By "great backward kick" I don't mean the form (I'm sure I was a gross Rule 6 violation), but the speed I could get. Sometimes the current in Coz was rippin', and I could backwards kick against it just fine. Must be something about the water...
Or maybe now that I'm trying to "do it right", I can't do it at all...