Actually whoops... going by wikipedia for both...
VIta has 37 Retail Games released or scheduled for western release this year.
WiiU has 18 Retail Games released or scheduled for western release this year.
Here's the lists for those interested.
Vita:
MeiQ: Labyrinth of Death
Root Letter
Steins;Gate 0
Superdimension Neptune VS Sega Hard Girls
Sword Art Online: Hollow Realization
World of Final Fantasy
Yomawari: Night Alone
Shantae: Half-Genie Hero
Psycho-Pass: Mandatory Happiness
Shiren the Wanderer: The Tower of Fortune and the Dice of Fate
Zero Time Dilemma
Odin Sphere: Leifthrasir
One Piece: Burning Blood
YIIK: A Postmodern RPG
MegaTagmension Blanc + Neptune VS Zombies
Stranger of Sword City
Trillion: God of Destruction
Samurai Warriors 4: Empires
Senran Kagura Estival Versus
Saturday Morning RPG
Oddworld: New 'n' Tasty!
Volume
Akiba's Beat
Fate/Extella: The Umbral Star
Exist Archive: The Other Side of the Sky
Criminal Girls 2: Party Favors
Attack on Titan
God Eater 2: Rage Burst
Hatsune Miku: Project DIVA X
Lego Star Wars: The Force Awakens
Grand Kingdom
Gal*Gun: Double Peace
Assassin's Creed Chronicles Trilogy Pack
Aegis of Earth: Protonovus Assault
Lego Marvel's Avengers
Atelier Escha & Logy Plus: Alchemists of the Dusk Sky
Atelier Firis: The Alchemist of the Mysterious Journey
WiiU:
Harvest Moon: Seeds of Memories
Paper Mario: Color Splash
Razor Global Domination Pro Tour
Bloodstained: Ritual of the Night
Lego Star Wars: The Force Awakens
Terraria
Mario & Sonic at the Rio 2016 Olympic Games
Tokyo Mirage Sessions ♯FE
Mighty No. 9
The Book of Unwritten Tales 2
Star Fox Guard
Star Fox Zero
Pokkén Tournament
The Legend of Zelda: Twilight Princess HD
Chasing Dead
Lego Marvel's Avengers
Minecraft Story Mode
Brunswick Pro Bowling
So yeah... going by that it seems almost certain Vita will have more retail releases in the West in 2017 than the WiiU which is being replaced in March.
