No, a reflector housing will not have a super sharp cutoff, but it will have a cutoff. What people do not understand is that when you install all HID kits, you need to adjust the headlights to ensure you are not bliding people. This includes projectors. When the vehicle has halogens in it, you can angle it higher without blinding people because the light output is less. With HID's, the light output is so much greater that you need to check them to ensure you have a low cutoff. BTW...no my G35 does not have a super sharp cut-off either. It has them as a vehicle with halogen housing that HID's have been installed on.

Here are some examples of halogen housings with HID's installed...





Here is a before and after from halogens to HID...see that the HID's are hitting higher up...I.E. can blind people unless adjusted.





Here is another cutoff with reflectors that were originally halogens.