The 4 mix isn't exactly a traditional 4 stroke like the honda trimmer he is referring to and the BR600 is a blower, not a trimmer. I'll stand by what I said - virtually nobody uses a traditional 4 stroke trimmer like the Honda he is referring to.
This is his point: "Four strokes run at a lower rpm hence lower temps and the oiling system in a four stroke allows for much better lubrication."
4 mixes are more like a 2 stroke in that regard than a 4 stroke. 4 mixes use oil in the gas, not a pressure fed, sump based separate oiling system like he was referring to in the Honda.