The C-System is about equal in overall oil handling to the Twisted Fury Pearl, in my estimation, but the C-Sys 2.5 has significantly more backend movement and a sharper breakpoint.
I'd guess the C-SYS 3.5 or the Wild Card is a step up, but I'm not sure they're a step down from the Virtual Gravity. Except for the Wild Card, they're all Mass Bias balls and, as such, can have wild variances in drillings to produce very carying results.
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"None are so blind as those who will not see."