I run a Husqvarna 455 Rancher, and have since 2005. I swapped out the 18" bar for a 20", and installed a Oregon Power Mate sprocket system. I'm running Carlton full chisel chains. I cut between three and six cord of hardwood [primarily Cherry, Oak, and Maple] a year, as firewood is my primary heat source. I have never been let down.
Comparatively, my best friend runs a Stihl 20" Farm Boss, the same one you were considering. He also added the Oregon sprocket system, and runs the same chains as I do. Cuts about the same amount of wood as I. He has never been let down.
You couldn't go wrong with either saw. They are a great general purpose, "around the farm" saw.
Last edited by J23; 11/04/19.