With 14#, you may find that you carry some hits differently due to deflection. A light hit that just barely carried the 5-pin with a 15# or 16# ball might not do that anymore because the 14# deflects more. But a high hit that left a 9-pin with 15-16# might suddenly start carrying with a 14# ball, because of that increased deflection.
In the end, you will be more effective in the long run with a comfortable weight than with any particular weight.
SH