Irrelevant with that choice, when you say AxB , is it sets x reps or reps x sets? Is 10x5 10 sets of 5 reps or 5 sets of 10 reps?
Also, FWIW, KF's volume sessions were 5x8 ( 5 sets of 8 reps ), where those 8 reps were all out, looked more like a short-break MSEM cluster of 8 singles ( without the un/re-racking ).