The APX2 & APX are extremely similar skates. Stiffness wise they are near identical. The X100 has a slight dropoff in stiffness compared to the apx2/apx, but because of the Curv composite, it is still a very stiff skate. If you wanted a skate similar in stiffness and features as the x60/x7.0, you will want the x90. As JR mentioned the TotalONE NXG pant (And all Supreme pants) is now a girdle system, if you're looking for the TotalONE replacement, you will want the Nexus 1000.