After taking a look at the game comparison (I love to have these things back!), both games are selling at the same rate nowadays so, given that Super Mario 3D Land launched first, I'll also pick 3D Land.
Please excuse my bad English.
Currently gaming on a PC with an i5-4670k@stock (for now), 16Gb RAM 1600 MHz and a GTX 1070
Steam / Live / NNID : jonxiquet Add me if you want, but I'm a single player gamer.