The E-S 1000H is a little more simplistic. It uses a fairly unsophisticated circuit board and magnetic limit switches in the open and closed position. It basically turns on and runs from one limit to the other. The Allegiant is a more technologically advanced. It uses a fixed limit in the open position and a learned closed position through programming. It has planetary gears which make the operator incredibly efficient. Also the control board has an add-on professional board that has inputs for loops and other devices.