In certain markets I too believe the 543xp will be more popular than the 550xp, specs and claims are all in the eye of the beer-holder. A 5cc difference is not much its the hp that is the deciding factor, to really feel the difference in performance of a saw in the cut one needs at least 10cc of difference all other factors being the same.
I'd say certain
applications rather than markets. And it will be just as important that people notice a weight difference as they do the power; maybe more so. If it doesn't feel lighter as soon as you pick it up, you're going to set it right back down in favor of the 550.
Comparing the current 346 to a 242, you do notice both the power and weight differences. In some applications, the 242 is the better saw to grab. Light, great handling, with good power up to a point, because you can only do so much with 42cc's. The 346 has a little more weight, but a bunch more power as the wood gets larger. So, the 346 is a little more useful in the sense that it covers a wider range of saw tasks.
But when you have a silly amount of other saws, a 242XP is a real handy saw to have around. There have been very few true pro saws in that size and weight class. It was so good in it's day that Husky never really needed a top handle saw. Lot's of guys like to climb with a rear handle saw, and some large tree companies are looking at eliminating top handle saws to discourage one hand usage.
The little 435 is a nice light saw, but it's of course a homeowner item. Still, I have guys that climb with them because of their light weight. I was thinking about doing a muff mod on one and see how close we can get it to a 242 in performance.
But, if the 242 is the 543's target, I do think it's a great idea. :msp_biggrin: