its not goin to matter either way imo, performance will be the same... only difference in size will up by the toes and you don't explode much for the jump off your tip toes (i'm talkin on the very end)... maybe go for the 10-11

*however though it may slip a lil under ur regular soles and the heat friction could cause blisters so hmmmm actually go for the larger pair... you can always cut them to perfection size wise. however, performance wise both would of gave you the same results.