It can be, yeah. The only difference is you control all the links as far as what formation they get into, and you have to use more strategy when it comes to using items because all the Links use the same secondary item at the same time instead of getting their own individual one in multiplayer. Sorta makes you have to think more, hehe.
Turns out, I was getting Four Swords Adventures confused with Four Swords which is an add-on to the GBA Link To The Past port. There's also supposed to a Four Swords for the DS, but I'm not sure if it's multi-only or if it takes consideration of those of us with no friends. Mope.