I have three 562's. First an old "logger used" 2014 model, starts runs and restarts fine, a bit tired with piston rattle. I figure I'll run it until it grenades. Need pyrotechnics for the video channel...but still waiting. My first modded 562, was a blend of the first edition 2012-13 top end decked with a popup piston. Muffler modded, basically what is now my typical "HTSS" build on them. Its a bread and butter saw for me. When the video camera is off, its one of two saws that does most of my work. into year two on what was already high hour parts. It does have a new 6 screw bottom end and an el48 carb. Love that saw. They there is the other build which is essentially a Husqvarna 560 or Jonsered 2260. Done "HTSS" style with a decked cylinder, cut covers, and muffler mod. It's reason to exist is light weight (Sugihara 18in bar and its a small mount set of cases from a 555), and it too is an excellent running saw with no issues of any kind. Did a little video with all three a while back.....how to start an Autotune...
I have yet to see an Echo in this area. Several dealers carry them, I'm assuming because of the Koritz roots they are well done, just no one buys them here.