The Wine U-dot is a three piece ball and the Burgandy Hammer is a 2-piece ball.

The Hammer would be a lot more aggressive than the Wine U-dot. In fact the Burgandy was the biggest hooking ball when it was introduced.

The Wine u-dot was the less aggressive brother of the Black u-dot.  

I not sure if aggressive is the term to use here. I had a burgundy Udot, and still have a burgundy Hammer. Both balls were the class of the litter in their day. Burgundy Udot was great in medium oil, especially if you had a lotta hand, for consistency and carry. The Hammer on the other hand, I kept dull and only used on Hvy oil. Great rolling ball.Tended to drive the pins backward and in one direction, when you were consistent with your release and follow-thru. I would swing this ball, with a small amount of loft, to prevent roll-out. It was drilled simply label. The UDOT was drilled about 4x4 stacked. They were both good balls, but I can't exactly call them aggressive. They were.. what you put into them, because they were urethane.

To follow up BR's "inside info" on old burgandys.

The balls that had issues were the original runs out of the baltimore plant.  You never really knew what you were gonna get drilling one of these.  The original couple of runs out of the utah plant, though, were total monsters.  We used to sell them for a $20 premium over the "B" balls.  The runs of "utahs" stopped when fab sold the plant to HSP (now know as a little company called Storm...).

I saw a little something different out of the original "hooker" blue hammers.  All of our first original run balls hooked a ton (a good arrow more) than all the suceeding runs.  Dull or shiney .
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