Peri, both are very good balls. However, the Thing should be drilled 4x4 or 4.5x4.5. It should not be drilled to roll early -- it will bleed off energy on the way to the pins. The Wicked is a more pure skid-flip ball, it is substantially longer than the Thing and very strong through the backend. I
In my humble opinion, the Thing is a better ball for the player with medium to higher revs and low medium to higher speed, while the Wicked better suits lower rev to speed ratio players, so long as they are not higher speed players, because the Wicked will simply go too long.
The Thing, for me, is also a stronger ball, but it would not be so for a lower speed, lower rev player who needs extra skid to get the ball through the heads and midlanes.
Yours, Term
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"It's just a carry contest."