AHA!
So THAT's why my 60 deg LW is so much easier to play in bunkers than my SW.
The smaller bounce makes it easier to 'pick' the ball off the fairly hard, compact sand in our bunkers (Denmark - think plenty of rain), while my SW tends to 'dig in' and demand a fairly substantial effort to get the ball (and about 10lbs of sand) out of the trap.
Things are beginning to make sense, here.
So, let's say you need to use your SW from the fairway - pitching in or even a fullish swing from some 80-90 yards out. Would you then prefer low or high bounce?