I have a Bee and a Falcon and am very pleased with both. The Falcon and P-70 are almost the same size. The JF-100 is a few millimeters bigger. You can compare the dimensions shown on Jetcat USA's and Jet Central's websites. The JF-100 is heavier, about 1/2 pound, but puts out a lot more power and the throttle response is spectacular.

The two engines are not in the same class. I don't wish to open an old argument, but a number of people who have checked Jetcats have a hard time achieving advertised power. Jet Central turbines typically overachieve their advertised numbers. My Falcon ran 23.2# in Mexico City (6000 ft. ASL). Correcting that back to sea level yields about 27#. The Falcon is well worth it IMHO.

Joe