Howdy,
Don't get too carried away thinking that it is the saw motor that cuts the wood. In reality, it is the chain. If you learn to file correctly, pefectly, basically you can't be beat. (Assuming the motors are at least within reason of the class of each other!).
The old timer who taught me used to say: "Look at the other guys chain, and then do just what you have to do to beat him. There is no such thing as a chain that can not be beaten!"
I used to use an old 797 McCulloch for my demonstrator when demonstrating chains to the Northwest loggers. They of course were using the big Husky's and Stihl's. I just wanted to make the point, and at the same time not get involved in any Ford Vs. Chevy arguments.
In South America, I used a 680 Shindaiwa, demonstrating in a market where the 070 Stihl was the standard saw, and out cutting them in some rather huge wood. The guys were amazed, and after getting their attention, they would show up for a meeting in the evening where I explained how they could make the job with that 070 a whole heck of a lot easier and less costly. Then FIESTA! (Terrible beer). In return, I learned the neatest and most useful trick for freehand ripping planks.
Regards,
Walt Galer