Xeno will sell more

Splatoon.

Nothing non-cartoony/mascot-ey has sold particularly well on the Wii U and I doubt Xenoblade is changing that (other than like maybe Hyrule Warriors which has an obvious IP advantage).

Both will be sales disappointments though (unless you set the bar fairly low).

There needs to be a Xenoblade Chronicles X, port to Xbox1 & Ps4.

Xenoblade did fairly good on the wii, i expect something similar from XCX. Splatoon in the other hand, well, i think its gonna bomb hard.

I am surprised how splitted is the comunity on this, I expected one game to be chosen way more than the other.

You must be new here.

850k-ish on a 100 million userbase isn't exactly anything to throw a party over. 

Neither have Mario/Luigi/Link/Fox/Samus in the game so I don't really see either doing good numbers(even relative to the install base). Bayonetta II's sales were not crash hot even with multiple gaming outlets giving it perfect 10s.

How much are you expecting these to sell? I'm thinking 600k fairly quickly, over a mil ltd. Same as Bayo 2.