Side by side 2 boats built the same one puller the other pusher, the only thing different is a little more weight from the roll cage, they ran side by side, with the pusher having a quicker responce time in the turns. The next advantage of the pusher, it is easer to make a roll cage/prop guard look better.
Either set up, the main thing is to learn your boat, know what its going to do and when. If your going to race your boats, a good driver of a slower boat will out run a faster out of control boat on a course.
it may have been seen, a 46 puller out running a 61 pusher, I know of a 61 pusher that, flat out walk right over a 46 puller.