Ok I put on my lab coat and took it to the table. I alternated between methods. My first make was the curve ball which left the cue ball approximately 6 inches from the end rail. A couple of attempts later I made it with center ball and the cue ball stopped an inch off the rail. Still alternating I had 2 successful center ball cuts with no curve ball success. Each center ball success left me a little further from the rail each time with the last stopping 3 inches clear.
My conclusion is the curve ball requires more skill but gives a quicker stop. My choice for money would be center ball, at this time. The masse will be getting more of my practice time now though.