In my opinion, it's no contest......the O.S. .46

It's powerful for its class..only runs a few hundred RPM under the expensive, poor idling "racers," and, more importantly for twins:

It's very reliable. I've run several of them, including a reverse rotation version for a Duellist, and I can't remember having one quit on me unless I did something stupid like run outta fuel or forget to change the glowplug once a year.

mt