I want to do is echo the 'lovely Clara Guerraro' comment. I got smacked by my wife for saying that out loud yesterday.
I have seen both and I would recommend the solid. Basically the difference is that the pearl goes a couple of feet longer before making its move.
I bought the solid for my wife (before she smacked me
) as a step down ball from her Paradigm. Last night in league she switched from the Paradigm to the Thunderstruck solid as the lanes were breaking down from the 2nd to the 3rd game. Last game - 256. In case you are interested she is a high speed (17-18 at the pin deck) medium rev. (13-15) power stroker.