I was talking about them to a neighbour of mine who is some kind of scientist fluid dynamesis type person lol
He thinks the same as I do and that is........
You cannot compress a fluid therefore if it has the same bore tolerances ( ie fits the bore )then it doesn't make any difference what shape the back is! Where is this taper sending the oil? Nowhere that's the answer
The only reason I can see them feeling better is for the actual material them selves being softer therefore giving a secondary damping force by flexing.
If there is only oil in the shock it makes no difference what shape the top or bottom are, especially which way round the taper is top or bottom lol it makes no change at all.
Lol
Think about it
