Other variables is length of pattern and backends. I have 2 balls used on medium condition. One is a control arc with a 4x4 1000sheen, the other is a pearl shined up with a label drill. On the house I normally play Sunday night the control ball has more overall hook by 2 boards. But at another house Tuesday night with shorter oil pattern and lively backends the polished ball will have 3 boards more over all hook. So this is where you can get different responses for the same ball. The thing to remember is the polished ball react stronger off the dry, and the dull ball will get you an earlier read in the oil.