Husqvarna 580BFS Mark II vs 580BTS Mark II - The differences

There is pretty much no difference between the Husqvarna 580BTS Mark II and the Husqvarna 580BFS Mark II. The main difference is that the 580BTS Mark II has a tube throttle, while the 580BFS Mark II has a hip throttle. Whether the hip-mount or the tube-mount is better is a matter of personal preference.