Ratio change in HP Pro diff?

[Patrick]

Does anybody know if you can change the ratio of the HP Pro diff to the same as the standard one.
I think they both have a 43t crown/ring/spur gear. But the pro has a 10t pinion and the standard has a 13t. (I'm not sure if that's right or not).
So can you put the 13t pinion in a pro diff to change the ratio?
Is the cut on the ring gears different? Is the ring gear positioned differently?
Thanks