I fell for the hi mass bollox years ago, swapped out a BBOT for a Badass II, all It resulted in was a lot of arsing around and a higher action, sold it on here, went back to the BBOT, and there I've stayed.
The only time I've noticed a difference in a Hi Mass is on one my Thunderbirds, where I replaced the 3 point north Sea oil platform for a Babicz FCH3.