What are the perceived differences b/tw KC and DX-BB (Big Bead/driver) Aviars as far as flight for driving/approaching/putting? Why do you prefer one over the other?
Signed,
Aviar P&A guy

They new run of BB are about the same as KC's. They are both the X mold (Blunter Nose) Some of the early runs of the new BB has a weird sunken in flight plate. The newer ones are stiff and flat to slightly domey. I've also seen a few poppy tops. The newer runs of KCs are flater and stiffer than early runs of 12x. They are also more stable.

I like the feel and wear of the KC. A bit stiffer. I use 9x for putting (not blunt nose mold) and 10x for tossing (blunt nose mold)

Older DX BB aviars are pretty much an aviar P&A with a big bead and no blunt nose.