Well, I didn't own either one but I've seen both in action. To me, the X-treme is much stronger. From what I saw, the Deuce, in box condition, would only work for 2 or 3 games before it would gloss over with a shine and begin losing pop significantly. The X-treme does not seem to have this problem. Plus, the X-treme seems to be more continuous than the Deuce. Once it starts moving, it doesn't stop. That's just what I've seen. As for your choice of a X-treme or the Thing Lives, I'd probably go with the Thing Lives, seeing as you like what DT has to offer. I think the two are going to be comparable in terms of strength, so go with what you know. Either one would make a good choice for medium-heavy oil. Good luck.
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I can't bowl 300, but I can bench 310 : )

I threw the triple xtreme, and its a beast. Never threw a deuce, but Im pretty sure the xtreme is deffinitly stronger.
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16 years and still going strong! 16 years old that is! The names Warrior Princess, Xena..Warrior Princess
And why would I "saw" pins in half, THATS A WASTE OF PINS!

BK,
  Ok, I see you were comparing it to the Duece, but same argument applies.

I have not thrown these balls, but have seen tons of them.  The only difference I see is as charlest said when the balls start to hook.  Drillings aside if you take the two drilled exactly the same from what I  have seen the triple xtreme will start hooking quite a bit earlier on the lane.  The deuce gets down the lane a little cleaner with more flip.
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I don't really play cards and I am not 79, but it fits together somehow.

good to here that my thoughts were pretty much on the nose.. same cover, basicly same core so its  a no go for me! thanks guys