totally differant saws. The MS 360 is based off of the older 036 design with rubber vibration dampning, torquey powerband and over durablitily.
The newer 361 replaced the Ms 360 and is a total redesign. It has spring mounted vibration dampners, a better air filtration system and a higher powerband 4 port engine.
Most guys like the 361 better
I and a few others like the 036/360 for the torquey powerband and overall one of the best stihl saws ever made. Some say the same about the 361 also.