I use to run a lot of Stihl chain, it's harder and IF you keep it out of the dirt, it stays sharp a bit longer... BUT, it's also harder to sharpen, so I call it a wash...
I buy Oregon chain now and it cuts/works just fine for me...AND it cost quite a bit less than Stihl chain...
SR
X2. I've run Stihl Chain. It's certainly good chain. The teeth are harder, so it does hold an edge longer (if you don't hit dirt/stone/metal, it doesn't matter: any chain will need sharpening). It definitely takes more effort to sharpen it, however, and it's more expensive.
I now run Oregon chain all the time. Slightly softer, so it can lose it's edge a bit faster, but it sharpens easily and cuts well and runs smoothly. I'm cutting mostly hardwoods (Beech, Oak, Maple, Hickory, Black Birch), or whatever that last big storm blew down.
I generally plan on touching my chain up after each tank or every other tank of gas (or whenever it's not "self-feeding" into the wood), but I tend to be obsessive about sharp chains (as a chainsaw safety/felling instructor once said: You don't sharpen a chain
because it got dull, you sharpen it to
keep it from getting dull.) The sharpening break also gives me a chance to "self-assess" how I'm doing. Something I don't pay enough attention to while I'm in the midst of cutting.