Having both the Stihl 261c and Echo CS4910 - if they were cars, the Echo is a Honda and the Stihl is a Ferrari. If you want reliable running/easy start, get the Echo. If you want speed cuts and the Stihl name, get the Stihl, but it's finicky about it's start up routine. The Stihl was bought first (per the buy once cry once saying) and someone killed it and had to go into the shop. While there I picked up the Echo "for the meantime". Echo turned out to be a really good saw. Honestly, would have been nice to have bought it first.
Both saws will cut logs - keep them cleaned, lubed, fresh fuel, sharp chain. It's the cutting experience and cost of purchase that are different. I'm not blaming the break down on the Stihl, that was all operator error. But using them head to head for the same jobs, year round in all the 4 seasons, the Echo is much easier to live with.