I have both and I shot different load for each, my 75 Shadow love heavy bullet, 135-147 gr soft shooting no muzzle flip at all while Sp01 Shadow I like it with 124gr pretty flat shooting.
Rowdy, I like your point that we do get lazy sometimes, that I caught myself not front sight focus but target focus with my Spo1.
I like my 75 Shadow T for IDPA but use SP01 for USPSA.