Should be direct swap over as long as both track lengths are 137" (rear shocks)
Just remember the Qs3 and Qs3R are not identical. So the Tcat shocks do not have rebound like the LEs have with "R" shocks. But they are still a very hi end shock for sure, likely a bit cheaper too, then Qs3Rs.
I think it is the Cat RR model that comes with same as LE model "r" shocks.
Dan