This is my view on the Track balls. This is based on balls that I own or have owned.
PHENOM UNLEASHED: First ball Track ball I bought. Great ball for med/heavy oil. Awesome back end and great hit. Grade: A
HAVOC: A lot stronger than advertised. This ball for me had a very strong mid-lane and hit real good. For the price this ball was a steal. Grade: A
CRUNCH TIME: Great ball for med to light oil for me. This ball was all about backend. I could send this ball way out and never worried about it coming back. I really liked this ball. For med to light oil this ball was a killer. Grade: A+
XCEPTION (original): This ball hit hard. For me this ball was hard to control. I just couldn't get consistant with it. Grade: C
ANIMAL: Excellent ball for med to heavy oil. Very versatile ball. If polished can be used on med oil. If dulled can be used on a flood. This ball ignored carrydown. Great mid-lane strength. Control of the break point was great with this ball. Great ball for tough conditions. The Animal flat out smashes the pins. This is the hardest hitting ball I have ever owned. Grade: A+++++
ARSENAL REACTIVE: Great ball. Awesome mid-lane and back end. This ball can handle a good amount of oil. This ball ignores carrydown. The hits hard! Grade: A+++
ARSENAL ANGULAR: Very versatile ball. I can use this ball on light to med/heavy. Great ball for going coast to coast. The cover on this ball is awesome. Great ball for sport or tough type of conditions. Carrydown; forget about it. This ball eats carrydown for breakfast! This ball hits and hits hard. I would say this is the second hardest hitting ball I have ever owned. Very forgiving ball. Grade: A++++
SLASH: Great benchmark ball. This ball could have been called Smooth instead of slash. Grade: B
DELTA 1: Drive! This ball drives very hard. I have never seen backend continuation from a ball like this one has. The Delta doesn't hit super hard like the rest of them but carry's real good when in the pocket. The strong drive is a double edged sword for me. When I miss light with this ball I tend to leave a lot of splits compared to other balls. Grade: C+
HEAT: Great ball for light oil. Gets good length and has a big back end. For me this ball didn't hit real hard. Not even close to the angular with hit. Grade: B
DESERT HEAT: Dry lane ball! This is a true dry lane ball. What's great about this dry lane ball? Well it's reactive. It has a good core. It hits very hard for a dry lane ball. The desert heat has a smooth but strong arc to it. Great ball for tournamnets or tough conditons. This is a ball that every bowler should have in there bag. Grade: A+
Well Track guys these are my opinions so far.