Why are you guys fighting over the neck radius? Isn't it a custom shop model? The neck radius can be what ever you want it to be?
If it's a USA Run then no, they'll all be identical, hence "run". Of course you could order a CS Jackson with whatever specs you want, though it'll be a good amount pricier than one from a multiple guitar run (we're talking thousands).
As for the MIJ one, it's not going to be customizable.