The slide is the same on both guns. The 5" model has a compensator on the end of it. Take-down isn't easy to begin with & the 5" model the compensator makes it a bit more difficult. I haven't heard anything about more accuracy with the 5" model but it would be logical to assume the longer barrel would help out. I found the 3.4" model to be remarkably accurate, especially with good quality ammo.