Yep, throttle lock, and a superior oiler on the 1201.
881 has no throttle lock and a very stingy oiler. About 3 oz of oil per 16 ft long rip.
1201 has larger crank, and better low-end torque.
881, if you hit a rock-hard spruce knot and the chain be too aggressive, it falls flat on its face....bogs to zero rpms.
1201 runs cool, 881, being a stratofied saw, heats up after a 16 ft rip. Gotta high idle is for at least 1 minute, to cool it. Definitely have to run a smidgen rich on both the high and low jet.
BUT, the 881 is the easy button. Excellent filter, cleanest clutch cover ive ever seen, never builds up gunk. Can swap to softer 880 rubber av mounts, for when rubber turns hard as a rock in 20 below zero winter. I have two sets of rubber av mounts.
Its light enough that I even buck firewood for about 4 hours at a time, before it feels heavy, a nice narrow powerhead. Balances a 36" bar perfectly.
I have milled enough wood with the 881 to build a 36x40 2-story shop, and a 26x16 ft cabin. I know it well enough. I guestimate about 22 gallons of 40:1 mixed fuel through it with no mechanical issues.
I like that the high speed jet isnt fixed like on a 3120, Important to tune saw right for 20 below zero.