Gator tips are made by Andy Gilbert.. Excellent hard leather tips good grips, chalk stays on well and they need very little maintenance.
These are denser and have a different quality leather than Kamui SAI, wich is a very popular break tip. Gator is much more similar to Zan Double Face. These are all layered leather tips and they are all very consistent.
If you want synthetic tips there's a lot to choose from, but generally chalk adhesion suffers, you may get a little more power from say a Horo black storm or Tiger icebreaker, but today with so many players using CF shafts, power is seldom the issue, most players are looking for control, especially on those 9 ball cut breaks.