comp lifter failure

Well I am taking the lifter to guy who is a big time engine builder at a shop here for him to look at, this is the place that I got the cam,lifters,valve spring retainers from.I all ready know its toast.This lifter has no wire to hold the guts in just a round clip.I must say very nervice about the rest of them.How much better are the comp lifters that stock ones?