Nah WD is more impressive it is a new IP and there is a chance PS4 WD sold through more than mk8's what looks like shipped units. MK8 came from a game that sold 33+ million units WD came from nothing. Also WD does not have japan but MK8 did have japan.
I have to ask. What makes you think it's shipped units as opposed to sales since it directly said "sales" not shipped. This likely includes the digital sales as well.
Uhhhg, comparing 33+ million units sold on the Wii? Well, first off that was lifetime sales of the game, not after a day. It's also crazy to compare the Wii to the Wii U since the Wii has sold over 100 million consoles as opposed to just over 6 million, of course the numbers on the Wii are going to be higher...
Gotta figure out how to set these up lol.