Crank pulley from lightened to OEM

[jazzdude]

I have decided to remove the lightened crank pulley, along with the lightened flywheel and racing clutch. I have kept the alta 15% supercharger pulley and the milltek exhaust.

I know people talk about the ati pulley being better than Oem, but in this state of tune is the extra expense of the ati necessary?

I understand the later pulley was an improvement on the earlier one, so how do I know I am buying the later version?