As previously reported, the Super Smash Bros. games coming to Nintendo 3DS and Wii U will differ in content. One of these differences is that the games will feature different stages. The 3DS version will feature more stages from handheld games while the Wii U version will focus more on console game backdrops.
Additionally, in the past, Super Smash Bros. creator Masahiro Sakurai once shared that he would like to have the two games connect to one another for some sort of interactivity, perhaps along the lines of customizing a character in the 3DS version and then transferring them to the Wii U version to battle on the big stage.
This is still the goal, Sakurai confirmed to Joystiq. The 3DS and Wii U versions of Super Smash Bros. will interact in the aforementioned manner. However, Sakurai clarified, cross-play between the two titles won’t be possible, due to them actually being different games.
The two Super Smash Bros. games are scheduled for release in 2014.