I also have done both at the same time with 4 up front and as many as 6 pulling and had all rods busy. There are days when one does better than others but for no apparent reason. The ability to change depth quickly when pushing makes setting up the pattern works better for me, and the ability to turn around quicker also helps. One other advantage is being able to run a smaller bait at any depth I really like, little baits really cook some days.