I have the Cleveland RTX 2.0 60 degree (spin 4.5) and RTX 2.0 64 degree (spin 3.5) wedges. The back spin from the 60 degree wedge is very pronounced while the 64 degree wedge does not back up at all. Granted, I am using starter balls but have used upgraded balls as well. The spin relationships does not change noticeably.
I don't understand why there is so much more backspin on the 60 degree wedge as opposed to the 64 degree wedge. Don't the 60 and 64 relate to the degrees of the club surface in relationship to the ground?