Been at this since the mid 1970's and have heated with firewood for decades. WAY back in the beginning it was Windsor or Oregon full chisel only. Tried some Stihl chain a few times, Carlton, and Archer most recently.
As a warning to anyone reading this stay as far away as you can from the Chinese varieties, the "no-name" stuff you see at the box stores with a symbol on the links. I bought a Windsor bar once on Ebay and it came with a loop of that bovine excrement. It broke before halfway thru the first tank of fuel!
Archer is mentioned as top shelf and we've found it to be OK, Carlton is decent as well. I tried the Archer bars on my CS-590/600p and the first one locked up after half a dozen tanks of fuel. I also had to run .058" gauge chain in it because .050" was too loose and it cut crooked it you "pushed" it.
The vendor replaced the Archer bar and the second one is doing fine aside from requiring .058" gauge chain to be effective.
Back to the topic. I love Windsor chain and bars, but it is not as ready available/easy to obtain these days. Stihl is pretty good, but I've ran into loops that are extremely "hard", not all that sharp right out of the box and takes some work to "touch them up" between tanks.
I keep coming back to Oregon and have switched most of my saws to semi-chisel. I find it cuts nearly as fast as full chisel but for sure stays sharp longer, especially if you are cutting tops left over from logging operations or logs we've skidding to a landing like we often do here.
So for me it's Oregon, the good stuff with the "blue" tinted cutters, no safety features. Don't have the part numbers handy and it's too early in the morning to remember, having BAD cases of CRS these days and even worse cases of DGS.......Cliff
