Nothing to compare it to in a stihl but I’ve ran my 455 with 20” bar and have pulled a pretty healthy skip tooth chain for close to 12 years and haven’t been kind to it. 10/10 would buy again. General tree felling, limb work, farm use and abuse cutting fence poles and such. It’s been slammed in the dirt, fallen off the tractor or from heights of a ladder. Heavy enough to get done what I need but light enough to hold onto for several hours of work. YMMV
Edit: from google:
The Husqvarna 460 Rancher is a slightly more powerful version of the 455, offering a larger engine compared to the 455's. Both saws share similar weight and parts, but the 460 handles longer bars (up to 24") better and provides more torque. The 455 is generally preferred for lighter, all-day use, while the 460 is better for larger wood