One has a chain brake on it - the other doesn't. One's missing the plastic cap on the manual oiler. I have a new manual oiler and several used ones with caps... One saw has a more definite piston thump at an idle which in my experience is more desirable. I quit using these saws when emissions outlawed them in the US then switched to Husqvarna. The saws have been stored for over 20 years. No Ethanol before I started them a year ago. Crank seals appear good but will need fuel lines and diaphragms. Cylinder pictures are tough because of lighting. Will pull the bar covers and take pics next week-end if interested.