Props to the OP for putting together the screenshots and you did a great job of finding matching shots but we really need some better samples. I've been listening now for 7 years how Wii games always looked crap because of the resolution yet now when we are doing a side by side we have Wii U screens that are sub 480p! If i posted Last of Us screens at that resolution in a thread discussing the game's graphical merits I know I'd hear about it. A comparison has to be fair before we can draw any conclusions.
Smash Brothers has had very good models going back to the Gamecube days but the impressive thing about the game has rarely been in the the very small details but rather the ridiculous amount of stuff flying around while retaining a rock solid framerate. I expect this tradition to continue.
Some higher resolution screens (from a game that isn't due out for about a year)