Downwind, she should be as fast or faster if you watch your hull
trim (crew placement) With a good Wind, downwind it can act as a
hydrofoil. Remember Conners lost the lead to the Aussies Wing Keel on
the downward leg.

A wing keel act as a hydrofoil on a displacement boat? In 70kts of
wind maybe. As far as comparing to a 12 meter AC boat pleaseeeeeeeeee.
There has never been a production boat that had a wing keel that
remotely resembled a 12 meter wing keel. The design concepts are not
even close. The design goals and functions are totally different.