Conceptually, they are one. Shepard really never talks much without being prompted by the player, the fact their dialogue is spoken out loud doesn't change the fact that they are nothing more than a player surrogate like any other silent protagonist.
I honestly don't think people would notice since the majority of their scenes together have the other party actually doing most of the talking just like with a silent protagonist. Like a SP, the player is only aware of the nature of Shulk's relationship with others by reacting to what they say. Hell, the most poignant scenes are the Heart-to-Hearts which are mostly just the player reacting to the actual chatty party members like a normal SP prompt. So yeah, I really don't think Shulk is an improvement since he comes across incredibly dry and vanilla in personality. This is what I feel is the real problem with chatty main characters, they're personalities are often the most bland of the party because they have to be made as inoffensive as possible in order to be likable and not accidentally cause the player to stop playing. Even some of the most interesting protagonists are often softer around the edges than their supporting casts can be.Originally Posted by Fox