Jiffy Stealth STX vs. Jiffy Legend XT - Iowa Sportsman Magazine
The 30 is the 3 hp model. The STX has a centering point and 2 small blades in the center as well as the chipper blade the XT has, it's more expensive to replace blades on the STX and the center blades break through just before the main chipper so the hole gets water in before it's done drilling.