Yeah I can see the CF butts being easier to specify various parameters across a product line, but custom designing them I'd have to imagine would be expensive.
I played with a Cynergy Truewood for years. I recently switched to the Cynergy X. Hit is largely the same. Maybe the X is slightly stiffer.
The biggest benefit to me of a CF butt is the same as the advantage of a CF shaft over wood, which is its resilience. I've whacked the X butt a few times in a way which would have resulted in a real ding in the Truewood. Over time, the Truewood also accumulated micro-dings of indeterminate origin, just from the general softness of the materials. However, my X is still flawless.
