Here's a few bits of anecdotal evidence for you to consider. First up, the placing of both games in the UK's top 100 games of 2013.

26. Aliens: Colonial Marines (Sega)
27. Pokémon X (Nintendo) 28. WWE 2K14 (2K Games)
29. Pokémon Y (Nintendo)

Second, the ratings for each game on the 3DS eShop.



Again, not a real indicator of popularity, but certainly some interesting findings.