The profile of the weights cause them to feel or react differently. The actual gram weight is only part of the program. Remember it's all a combo of springs, primary weights, and helix angle that create your clutch function.
Polaris got pretty universally close on the PRO high alt setup. Carl's says about an average of 5 sled length benefit to their system. It appears to be a big plus in mid rpm pull but then also doesn't fade at the full shift out. My experience seems to support that statement. Their kit is a special TEAM cut helix and weight combo with different springs depending on your ap. I'm having good luck with very high "felt" performance and no adverse belt wear (heat or long pull fade) on their setup.