Games 3DS 2015
Etrian Odyssey 2 Untold: The Fafnir Knight, Project X Zone 2, Puzzle & Dragons Z + Puzzle & Dragons Super Mario Bros. Edition, Xenoblade Chronicles 3D, Etrian Mystery Dungeon, Story of Seasons, LEGO Ninjago: Shadow of Ronin, Fossil Fighters: Frontier, Code Name: S.T.E.A.M., The Legend of Zelda: Majora's Mask 3D, Monster Hunter 4 Ultimate, Ace Combat Assault Horizon Legacy...
Not confirmed: Stella Glow, Legend of Legacy. E3 possibilities.
12 games confirmed (5 Nintendo titles). released and not released yet. USA only.
Games WiiU 2015
Kirby & The Rainbow Curse, Mario Party 10, Splatoon, Yoshi's Wolly World, Xenoblade Chronicles X, Devil's Third, StarFox, Mario Maker, Project Giant Robot & Project Guard, Project Cars, SMT x FE...
Not confirmed: CoD BOIII. E3 possibilities.
12 games confirmed (11 Nintendo titles), released and not released yet. USA only
Excluding digital only titles (AoT Humanity in Chains...) and releases in both systems (MN9, Rodea the Sky Soldier, Terraria...).
Both systems have a similar software schedule. If the WiiU is getting more Nintendo games than the 3DS is because Nintendo are the only ones supporting the system. WiiU needs more Nintendo's attention than the 3DS.
Didn't even know half those games existed lol. Overall quanity might be even, however the 3DS line-up is pretty niche and Nintendo didn't quite put in it's best with 3 out of it's only 5 being remakes, and how many of those games released already as there seem to be huge gaps after Puzzles n Dragons.