[O.B.Left]

The question was based on all things being equal. The ball is on the clubface for 1/2 a millisecond. Therefore compression has to be equal. VH allows one to add loft versus HH. So for less compression the face would have to be layed back more at impact (therefore it is no longer equal).

Hey mb

But that wouldnt be "all things equal" exactly as you'd have to speed up Vertical's hands to get the clubspeed up to Horizontal's. The two arent "all things equal" assuming any #3 angle for the golfer standing on the tee.

The thing I dont get about the 1/2 millisecond logic is that its plenty of time for the ball get squished and rebound so why not roll on the face .......to varying amounts depending on layback or closing.

o.b.