I would say go ball top as the Sanwas and Seimitsus have that quick response that makes them a top choice among the competitive crowd. The only reason to go bat top, and I mean like a Happ bat top since thats what I find most people tend to mean by that due to those being in pretty much all of the American arcades, is being used to it. For example, on a bat top, when playing fighting games I tend to do double taps or fast back and forth motions by more or less smacking the stick from the side. The Sanwa style ball tops have a much shorter throw and feel much more clicky feel, vs the springy feel of a bat top and as a result, people tend to grip and use them differently.