I can add one thing... there are times when either configuration works a little better, but if I were to have only ONE... it'd be a barrel grip. The barrel will rotate in your hand, 360=B0, in effect, it adds another axis.
A while ago, I was cutting out a sink hole for a drop-in sink. The back side of the cut was under the windowsill and my top-handle Milwaukee wouldn't go under the sill for me to complete the cut. My Bosch 'just' made it under the sill. Caveat: One must remember that cutting in a direction that puts the side-mounted switch (on the Bosch) between the barrel and the wall makes shutting the saw off impossible.