well can't speak for the other 2 but I know the SF has been a fairly good medium/light ball. its definately not for toast or even really burnt up lanes, but it does do a very good job on lighter volumes of oil. Hope this helps
Jeremy
--------------------
"Strive to be perfect, that is afterall the only way to become perfect."
"If you compare yourself with others,
you may become vain and bitter;
for always there will be greater and lesser persons than yourself.
Enjoy your achievements as well as your plans."
Taken from Desiderata
Proud user of Columbia 300 and Visionary Bowling Products