Pretty sure I already chimed in on this one but I'll do it again. P-01 grips are slightly smaller (Note the small shelf above the grip on your P-01 just below the controlls -the SP-01 doesn't have this) but not appreciably, even for small hands. The length of the grip is different but this doesn't make a big difference on your grasp since your hand is high and tight on the grip.
SP-01 is identical to the P-01 in withstanding abuse as per the "torture testing" you refer to.
I am partial to the SP-01 Tactical with ambi decock BUT it can't be carried cocked and locked like the standard SP. The decock is harder to use than a Sig decock but still functions well. I prefer a weapon without a manual safety to disengage before firing. I used to have nightmares about having to shoot and not being able to pull the trigger. -Just me...
Get the SP-01. It's may be heavier than the 75B but it's a pleasure to shoot and you'll have an accessory rail so you can start drooling over lights and lasers and the sweet tactical bayonet CZ sells.
I love my SP!