Afraid I don't know of any differences.
When I fitted a reverse eye front spring, (with the middle leaf flipped and spring platform height reduced), the bump steer was awful - the car was jumping about all over the road.
I fitted these and the bump steer was gone.
I changed them for a different style as these are a bit fiddly to adjust for caster & camber, but the replacements are not really any different!!
Also, I've fitted rear shock absorbers to the front .
The spring was sitting on the bump stops so I cut them down a bit but I've since found the suspension works better without any bump stops at the front.