The Elf Shoe tech is just a name Armada gave to the combo of Rocker in the tip, camber underfoot and rocker in the tail..
From their website':'' EST FREERIDE ROCKER
The best of all worlds. Rockered tips and tails combined with positive camber underfoot to promote flotation in soft snow and provide remarkable edge control in the harder stuff. ''
So the elf shoe part has nothing to do with the reverse sidecut parts in the tip and tails..
Most important is that the CRJ's also have reverse sidecut in the tip and tails, 4FRNT just doesnt hype it with 5 dimensions.. If you look at the picture of the CRJ's on 4FRNTs website you can clearly see it..