Doc,
I have the SS solid, my buddy has the pearl (which I've thrown numerous times). For me, the solid has nice length (comes 1500 polished) a nice strong midlane and explodes off of the dry.
The pearl will get a little more length, a touch cleaner thru the heads, rev JUST as hard or harder in the midlane, and explode off the dry as well.
For me, there isn't THAT much difference. I would have to say though that overall the pearl has the bigger move on the backend!
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JEFF