G'day Steve and Norm

I'd go with the Husqvarna from what I've read.

With the old saws I too liked Stihl but some people that like Stihl saws will tell you Husqvarna saws are garbage and some people
who like Husqvarna saws will tell you Stihl saws are garbage.

The only way to know is if you tried both saws and picked the one you prefer or trust someone else to have the correct facts about the saws.

One review I read said the gripe about the Stihl MS 391 is how complicated it can be to start especially when warm. It is also prone to flooding when cold which can require you to remove the plug and make sure it is dry.

The 460 ​like all the Ranchers has a Husqvarna X-Torq engine. The X-Torq line of motors cut emissions by almost seventy percent and reduce fuel consumption by twenty. They are also CARB compliant for emissions.

Starting wise you have a couple of helpful additions to help start the 460 especially when warm. There is "Smart Start" ​which reduces the resistance on the starter cord making starting a little easier on the arm. And when the engine is already warmed up there is a decompression valve and an air purge diaphragm. 

The recommendation was to buy the Husqvarna Rancher 460

They felt that the Stihl was the more powerful saw but does suffer from a few issues. It is heavier and can be tricky to start.​ When warm it has a rather complicated starting procedure that really does take some time to get the hang of. 

https://woodworking-tool-guide.com/stihl-ms-391-vs-husqvarna-460/

https://www.arboristsite.com/threads/ms-391-or-husq-460.179247/

Some reviews here https://www.productreview.com.au/listings/stihl-ms-390-farmboss

https://www.amazon.com/Husqvarna-Ra...btm?ie=UTF8&reviewerType=all_reviews

https://www.google.com/search?clien...IwQBSgAegQICRAB&biw=1366&bih=643

Cheers
Max.