I've heard that the EPX T1 has a faulty coverstock which causes the ball to crack open and in some cases actually fall to pieces. Later I saw a ball in my local proshop that had a huge crack that went all the way around the ball. It was an EPX T1. I own The One, and it has let me down a great deal. I can't get it to react. I haven't tried sanding off some of the 4000 polish it comes with yet. Performance wise I'd have to say the EPX T1 is superior for as long as the ball may go before breaking.
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Look for me in the upcoming PBA Tour! I'll be the guy in the back row with the foam finger singing "Take Me Out To The Ball Game" during the 7th inning.