Straight forward question, which do/have you used and which do you prefer and why. Well actually 5 straight forward questions but math is not my strong suit.
You are showing your age. Go with Molle. I grew up on Alice and loved the switch to Molle. No more hardware poking and rubbing me. Though if you do go to Molle learn how to mount it correctly, not the half-ass way most people mount it.