Using urethane, I get carry down. My ball starts to fade, and starts to lose entry angle. I have to move out into the dry a bit more, and play a bit more direct, and throw it REAL good. I can do that
BUT
Usually, the guys on the other team, using resin, say “The shot tightened upâ€, move their feet a little, and DO NOT lose their entry angle.
My urethane carries down enough oil to effect its own reaction adversely, but NOT enough to kill the reaction of a well thrown, “good†resin ball. In fact, it often seems like their shot holds up better when I’m throwing urethane. I hardly ever hear complaints of the shot burning up when I’m using urethane, but I do when I’m using resin.
Resin changes the condition faster, AND is effected more by those changes, than urethane do.
With urethane, the oil carries down, the shot tightens up, and you have to adjust accordingly. Usually, that means moving into the dry a bit, using speed control to moderate the reaction, and throw it off your hand really nice.
With resin, the oil dissipates more than anything else, the shot blows open, and you have to adjust accordingly. Usually, that means moving deeper, using speed control to keep it from over reacting, and make sure not to over hit the release.
A ball is just a tool. It does what it does.
Sometimes, you need a pair of pliers, sometimes, you need a wrench.
Which one is up to you, but don’t gripe if the other guy is a better mechanic than you.