All the post are correct but both engines have a place. I have both. I have the BME on a Edge 540 and a Mokie on a Sukhoi. Both planes are in the 12-13 lb range and both engines perform great. As stated above the Mokie is a fuel hog but for the speed it produces to me its worth it while the BME is not quite as snappy but does the job a little cheaper.Both engines in my books are great and are proven in the air.