I love em both...
For the weight issue to me I pick the 346xp...I can sling that little saw around all day and dont hurt me at all..I can tell some diffrence in the ms260 pro,,just alittle tade heaver,,but it's built like a tank...You have to pick too,,and remember the inboard and outboard clutch between the Stihl and Husky....The rim sprocket change would be easy on the ms260,,but the 346xp,you have to spin the clutch off for a change,,,so thats a thought too...
To me both are great saws...Easy start ,,and a joy to run,,but look for the issues too with maint. as I metioned the clutch...Thats the only thing I have a draw back on the 346xp...
I had to pick the 346xp on the pole,,cause my ms260 is my woman's saw now she says....LOL!!!