The Blade slays the 99S if :
You want solid feel
Less power - but still a good amount
Did I mention the feel?
But yeah, it is a hybrid between a prestige and APD. Not sure what the 16x19 is like, but the 18x20 is amazing.
Please help TT Member BruceD get a wheelchair so he can play tennis again - http://tt.tennis-warehouse.com/showthread.php?t=496820