My take on this may be a bit controversial;
The Oregon LP is
very good chain - better than Stihl RSC in .325, and about as good in 3/8".
It may need to be filed a tad more often, but is easier to file. Also, Stihl chain never can get a as sharp as Oregon with optimum filing, because of the thicker chrome on the Stihl. Have you ever heard of a saw racing chain that is Stihl?
The LP bore-cuts better, because of the raker design - in case you care.
Bottom line is that the LP is a better design, while the RSC may have a tad better quality (thicker chrome).
Lab tests (Rockwell scale) showed that the Oregon steel was harder than the Stihl one - but it doesn't feel that way to me........
Stihl files are fine on Oregon chain - but at least over here the Husky files are better than the Stihl ones. Files shouldn't be used for long anyway - they are expendables that need to be changed out pretty often!