Case, bearings "steel cage" weight/thickness and quality of the housings. Also simplicity, no AT, Mtronic or fuel injection. Plus great AV, which in design is similar to whay Husky is doing with the limiter posts. Fit in finnish equal to or in my opinion maybe better than both Stihl and Husqvarna. Just a very well built machine top to bottom. Here is a tear down video Mitch put up if anyone is interested.
Out of the box the 7310 not have the power of the other pro saws in it's class, and it's heavy, especially for the stock power.
Echo power equipment is well supported locally and I can walk to a couple Stihl dealers, unfortunately there is little support for Husqvarna in the area, though I did find a dealer that stocks everything about an hour away if really needed, not that he local support really matter to me personally. For a guy depending on his tool to make ends meet, local support is paramount.
I try my best to call it as I see it, I like all brands, and I know Walt and most others here know that, and when I post up the numbers I do so because it's what I enjoy doing, and if there's some valuable info in that great. I'm not a pro logger, quit selling firewood a few years back, so it's more a hobby now and to feed the stove, with the upcoming cold weather I'll be feeding her a lot the next week or so.[emoji32][emoji111]