BJ, unless I am nmistaken, the reason you haven't heard why a person should spend extra $$ on an XXL is because to my knowledge, no one has one yet.
FYI, like you do, I used to think it was the dumbest thing I ever heard of when people spent extra $$ for Buzzsaws and I could see no proof they were any better. After numerous failures and spending a lot of $$ on two other companies equipment and having it fail to match up for my style, I received a "rock bottom" deal on a Buzzsaw. Since I had heard these balls were bowler friendly and an excellent ball for the average league bowler, I decided, "what the heck", I'm throwing away $$ on all of those other balls that don't match up for me, so what do I have to lose? I bought the ball and have not regretted it one day since. So the bottom line to this?......A person can not afford to be be "nearsighted" and just look at $$ of cost when purchasing a ball, they have to look at what works best for them and forget about cost. For my self and others, that's Buzzsaws.....And yet for others, I'm sure it is another brand.