Ripped CV Boot. 2 part numbers WTF?

[SlickGT1]

Sup fellow Xers.

I think I was DPing to hard on a lonely evening when I was all by myself.

After I parked the car in the garage, next day, there was a funny grease/diff fluid smell.

Checked the car quick, and shit, my entire drivers rim in geese. Yay, the joy of cleaning up a blown CV boot.

I also think I blew my high pressure hoses for power steering, as the fluid is low, and bunch of the hoses are wet. So, one problem at a time. I will make another thread for the power steering.

I go to realOEM and find that there are two part numbers for the CV boots. Condition A, and condition B. WTF. I can't tell what condition I have without cutting the boots off it seems.

Check out the link.
RealOEM.com * BMW E53 X5 4.8is Final drive(frnt axle),output shaft,4whl

I am talking about part numbers 31607565316 and 31607507402 for number 5.

Is the shaft bigger for condition B? Or is it how the boot is formed? Please help. Thanks in advance.