My decision too...?
On the face of it two very similar looking bikes for sure. The numbers are so close to make no difference at all.
I think it would come down to suspension performance, which includes G2, and frame stiffness
The Expert has been compared
to the DW Sultan to be at least as good a performer which sounds very promising.
My understanding is the RF is similar to VPP and I read here of one rider reporting a need for propedal.
My priority in looking for a new FS bike is it being an efficient pedaler, and it seems the Spesh may get the nod on that.