Will B44 CVD's/axles fit the S4/BJ4 hubs?

[Team No Idea]

Does anyone know if the rear CVD's and axles are the same for the BJ4 and B44.
My S4 is in urgent need of some new ones and i was going to fit the B44 CVD's as they are easier to get the the BJ4 ones that are currently fitted.
Someone told me last night that the rear hubs were different on the BJ4 to the B44 and so therefore they may not fit