With the binding off of the board, it should be pretty clear.
Turn the binding upside down so you're looking at the bottom. Look at the toe/gas pedal part of the footbed from the bottom. Are there little plastic tabs coming through from the top with a catch/barb/snap thing? Maybe 4 of them. If so that is what latches the top of the gas pedal to the plastic bottom. These two parts encompass the front of the baseplate. These two parts together slide forward/backward on the baseplate so you can adjust the footbed length.
Heck, if you unsnap the rear of the footbed with the bindings off, the gas pedal should slide freely in and out. Then you can see how it works.
If you'res doesn't look/work like this, then i guess they're different.
I have the re:flex ones shown here: http://www.burton.com/mens-cartel-sn...efault,pd.html