Your explanation is good, but the hours on the stihl saws are a bit off. Stihl tells us to expect a reasonably maintained pro saw engine (fuel filters, good fuel, clean air cooling path) to last at least 2000 hours, and the mid range occasional use 1000-1500 hours. We do see these type of hours on the pro saws, and more on the likes of the MS200T... Hard to measure on the "mid saws" as most users just don't use them enough in a lifetime. I have seen a couple of woodcutters with incredibly high time 029's -they look after their saws, use them every day, and they are still running. They look like crap , but keep ticking along...
But yes, there is much more to a saw than HP... or even weight... but you have to try one to know.
BTW, triva time... the built-in spell checker I use (IEspell) doesn't like "sawinredneck", and suggests "venerating".. Go figure...