I haven't thrown a Mix, so I can't speak from experience there; however, resin is almost always going to offer more pop than the urethane. I have a Tropical Breeze, and it is by far the weakest reactive ball in my bag. I'm talking like 19 boards weaker than anything else I have.
I found the TB to be a bit squirty out of the box. If I got a pinch fast or missed it at all at the bottom, it was 60 feet of skid. Now, since I had it for absolute burn, that wasn't the worst thing in the world. Still, I wanted a bit more consistency. As such, I hit it with 500 abralon, and, BAM, the ball became a beast! The rougher surface gave the ball a little bit of read. Not enough to burn up, but enough to feel like it was seeing the lane. Basically, the reaction I got with it looked like a stronger urethane but with much better power at the pins. The first game I threw with it after the surface change, I washed out on the first shot because I wasn't lined up properly. I made a move and then proceeded to throw the last 11, and I had all kinds of room doing it! If I leaked it wide too early, it read the dry, but it didn't over-react. If I got it slightly inside target, it held because the cover just doesn't have enough teeth to eat through the oil.
Long story short, I would go with the TB. I've bagged urethane stuff off and on throughout my bowling career, and it's great when you need it; however, I've found those times to be so few and far between that I'm not sure it's worth it. I think you'll get more bang for your buck (and the TB doesn't cost too many bucks! lol) with the Breeze.
