I guess I wasn't very clear in my earlier post, but once again here is my understanding of the differences between cueballs. The red circle is made of the same type of phenolic resin as carom balls, and the blue circle cueball made of the same phenolic resin as the object balls. From what I understand, there are now "measles balls" being made with both types of resins, though the more common one is the aramith super pro which is made with the carom ball resin. The carom ball material is significantly more elastic than the other pheonlic resins used, and can be easily spotted by it's off-white and semi-opaque appearance. There are also cueballs from all sorts of manufacturers made from different materials altogether, like polyester resin for example. Every different material has different elasticity and therefore plays differently. As Bob already stated, more elastic balls will draw better, and less elastic balls will follow better, even if they are the same size, weight, and mass.