That's s difficult question for me to answer. I love Stihl pro saws, always have, always will. I just seem to get better performance with less work from the equivalent Husky. They're usually easier to mod as well. Ring ends are often better placed for porting. Single ring pistons are sometimes available. They always have spring AV. They feel very good in my hands, but so do Stihls. About the only thing I don't prefer is their looks. They've grown on me, but I Stihl prefer the looks ok Stihl saws. At one time I simply couldn't stand their hi top filters. Anymore, it doesn't bother me so much, as I've come to appreciate them for what they are.
Now, none of this is to knock Stihl saws. They make a great product. If I weren't modding them, I might still have all Stihl work saws. Both brands make top notch pro saws, PERIOD!