They both work just fine. I kind of like the feel of the Speedfeed stocks. They feel solid as opposed to the hollow Remington stock. Even though the butt pad of the Remington stock is larger, the Speedfeed stock seems to absorb recoil better.
Another plus for Speedfeed is that they are available as short as 12 1/2" LOP.
By the way, Remington puts a delux plastic stock on some of their shotguns that looks like it could have been made by Speedfeed. I have seen the same stock with a script "SF" on the grip cap instead of "RA". I could be wrong about this. It's just my observation.