Ours is made from pre-heat treated steel, not aluminum; has a more aggressive texture; made to withstand harsh use & condition; and has a lifetime warranty.
I ran a Dlask mag release for a year, not a bad piece of kit. But I wore it out. Aluminum on steel as a bearing surface will wear. We designed ours from the ground up using the same tough materials we use in all of our parts (we opt to heat treat the steel 'before' machining, not after. This maintains our design specs and ensures there is no change in tolerance in from the heat treat process. This is also a tougher material to work with, and is also more expensive.). There is only so much room to work in the space provided, anything designed will have superficial resemblance.