I have both they are drilled simlar and have same surface, That said the rsx is much sooner than the saturn with smooth controlled backend where as the saturn goes longer but covers just as many boards as the rsx the rsx needs more oil than the saturn. The rsx can be alot more than the saturn and for my purpose it is for most part i play alot tighter with the rsx but on a much oilier line than the saturn. The saturn needs friction once it gets it it is gone. For example on a fresh THS with good backends i would normally play with the rsx 15 to 10 at breackpoint. On the same condition I would have to swing the saturn from 15 to 5. Probably with feet a couple boards to left which i am left handed. Got to get the saturn to the friction. Where as the rsx i didnt need to but the rsx needs head oil. The saturn dont. So they are both great balls in their own right. On seperate condiitions depends where you like to play but by far the rsx have a more overall hook potential. HOpe this helped you
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Boy do I love bowling, stone 8,stone 9, ringer 7,fly by 10,fast six got to love this game. Short look at what most of my games look like with a few strikes peppered in between. Isn't it wonderful.