I'm looking to install a bigger front sway bar on my Z3 (non-M).

According to RealOEM, the E36 and Z3 share the same part number, but, H&R sell a different bar for both cars.

Anyone knows why?
As I can see, there is ample space around, so it must be something not related to clearance.

Since E36 aftermarket bars are easier to find than the Z3 ones, would it cause a problem to install the E36 one on the Z3, if it physically fits?

Thanks.