They are one and the same
A couple of minor changes here and there but they are essentially the same setup. Recently I've moved away from using the toplink to stop the back colapsing and used the shocks instead, the result is a lot more rear side-bite and massive drive out of the corner.
The car was amazing at the regional; probably the best it's ever felt to drive. Just ask James Chappell who had a go at the end, I've a feeling there's going to be a XX4 for sale soon
