I'm looking for a small gas chainsaw for occasion tree trimming and maybe
emergency use (e.g. down tree after a windstorm).

Echo offers 5 year warranty, does that mean echo saw would last longer if
all else are equal?

Also do either brands have a means to drain the gas from the carbeurator for
storage? Most 2-stroke oil have gasoline stablizer but it is better to leave
no gas to gum up the carbeurator.