Lots of controversy on two stroke oils. The marine industry several years ago pushed for a new marine two stroke oil to cope with perceived engine corrosion problems. Sounds plausible, though I've not read technical reports on the claim. Other commentators say that marine engines run cooler internally. I take that with a grain of salt. A large two stroke engine pushing a cabin cruiser may operate at peak RPMs for many hours, with pistons significantly larger than anything commonly found in chainsaws, pruners, etc., and air cooled motorcycles.
Several major oil companies make and sell dual-rated two cycle engine oils. I've used one brand for years with no problems. Note that I am a light user despite having 10 or 12 air cooled two-cycle engine in various pieces of equipment.
Most small two cycle engines on hand-held equipment are not highly stressed, despite their noise level. My new Husqvarna 355XP chainsaw, considered a high performance 50cc saw, only puts out a bit over one horsepower per cubic inch. Racing air cooled two strokes easily double that, partly by using heavy resonance tuned exhaust systems, but water cooled engines have nearly eliminated air cooled motorcycle engines.
Individual oil recommendations, including mine, usually come with little scientific research, often reflect no more than a lack of problems, usually shared by other users with different recommendations The lack of objective, thorough, and well-documented comprehensive published research on two stroke engine oil is extreme.
If someone can advise on carefully done research papers, we will all become better informed.