Excellent bowling.
Glad you liked the Solution PPEx, the pearl; I like mine also.
The solid, the Solution PP, uses a slightly different formula in the cover (besides being a solid); it comes sanded to 900 grit.
Suggestion: don't ever make a wholesale change to any one manufacturer based on one performance of one ball. Yes, I like almost all Track products a lot. But take it one step at a time. Get another one, like the Solution PP, for medium to medium+ oil and see how you like it. Then add another for another purpose. "Test the waters first." Track makes a bunch of excellent products and people here on this forum are among the best on ballreviews.com: helpful, courteous and patient. So, be patient and enjoy!
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Bowling: Wish I could help me as much as I seem to help others ...
Life ... is what you make of it. No, really!