When asked on twitter about what graphical improvements The Swapper on Wii U will have over the PS3 version, Curve Studios responded:
"Anti aliasing, significant lighting and particle effects, depth of field stuff" and summarised that "it's essentially far closer visually to the PS4 version than the PS3".
@MaxWill37699872 Anti aliasing, significant lighting and particle effects, depth of field stuff, in short :)
— Curve Games (@curvegames) October 21, 2014
@MaxWill37699872 It's essentially far closer visually to the PS4 version than the PS3
— Curve Games (@curvegames) October 21, 2014