Ans: Basically there is no such difference between the two series. 460 Rancher is the upgraded version of the rancher. The main difference is the strength of both chainsaws. Huskey 455 has a 55.3 cc engine and 460 Rancher has a 60.3 CC engine. This means 460 Rancher delivers a more strong output than 455 Rancher. On the other hand, the recommended chain bar for 455 Rancher is 18 inch and 460 Rancher recommends 20 bar. Though different bar sizes can be installed in both chainsaw.