The Raptor was/is smoother. I manipulate the charging handle by pinching the latch between my thumb and pointer finger and the Raptor has a larger latch surface for this then the BCM without protruding further. It is not an issue for me, but some complain of being pinched by the BCM and while I do not get pinched, I can see where this is happening for them and looking at the Raptor, it seems this would be less likely to happen with that design. I have no qualms about the strength of either (I have seen a ACLM abi-charging handle destroyed in a class and do not forsee that failure happening to either the Raptor of BCM), but the Raptor is smoother and slightly easier to manipulate from either side to me. To me, it is worth the extra $20. I tend to be willing to spend money on what I feel is a better product rather then compromising with my firearms purchases though.
Do you need a Raptor to try out?