As we shop we often focus on specific details, such as power to weight. And we might lose sight of other details.

For example, the Saitos are known for their power/weight. And how do they do it? Engineering and possibly extra steps in manufacturing. Which would explain why the FA82 sells for $255 and the simpler 2C OS46AX sells for $105.

When comparing different engines, all the generally known differences are not always present. Model design and execution are almost always a balance of choices. So shop wisely, and look at all the things that matter to you.

Personally, I'd like to see what Saito would do if they produced a 2C line of engines. They could be awesome. Actually, they SHOULD be awesome.