Allright, I was finally able to test these two balls out over a couple of different conditions, and the results were fantastic. I was looking to get more midlane punch with a little less anuglarity from the Rival as compared to the Momentum, and that is exactly what I have.
Surfaces
Momentum: 4000 Abralon (No Polish)
Rival: 1000 Abralon w/ Finesse-It II Polish
Both balls are drilled with identical Pin to PAP distances and cg positions, with ending weights (side, finger, top) nearly identical.
Results
On a fresh THS (40 ft.), the Momentum is a killer. The 4000 surface really gives the ball the length, but without the polish on it, it really arcs hard on the backend. After a complete three game set with this ball in which I started to lose some carry near the end of game three, I went to a three game set with the Rival on the same pair of lanes. The games for the Momentum were: 259, 248, 225. I played the Rival on the same line as I left off with the Momentum, and it literally gave me the look and hit I had with my Momentum in game one. The Rival checked up about 3-5 feet earlier than the Momentum but it gave a super strong continuous move through the pindeck. I was actually able to move a little deeper on the lane and still carry better as the lane oil pushed with the Rival. The games with the Rival were: 289, 238, 269.
I bowled on the Scorpion and the Viper with these two balls. The Momentum was the perfect piece on the Viper. The ball excelled on the 37 foot pattern, bowling games of 219, 227, 238. This ball has the ability to open up the pattern and create area as the lanes begin to break down and change. I feel that if I had bowled more games on this pattern, the scores would have continued to increase. On the Scorpion, it was the Rival all the way. This ball had no problem handling the 42 ft. of oil and shined with the carry and hit it delivered. I was able to start out playing it fairly tight, but found that I could move around a bit and find carry on a few different lines. The games on the Scorpion were 239, 225, 248. I feel that this ball is so versatile, it could be used on a variety of patterns.
I hope this information helps, I know it was a great test for me playing with identical drillings and complimenting surfaces between the two balls. I am looking forward to bringing these two balls to all of my tournament and league stops this coming season. Thanks again to charlest and those of you who answered my original post on this subject.
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MainePBA
"I'd rather be a conservative nut job than a liberal with no nuts and no job."