If you haven't played Assault Horizon Legacy and you have a New 3DS, this is the version to get. The additions aren't major, but this version is the definitive one, as long as you own a New 3DS. If you don't own Nintendo's shiny new handheld or played the 2012 edition, hold off because there isn't anything new for you here.
Mario & Sonic at the Sochi 2014 Olympic Winter Games is exactly what it says it is: an Olympics game with Mario and Sonic. While it is fun, it doesn't necessarily do anything past entries didn't do. That's not necessarily a bad thing though, because overall it is a solid formula, despite some of its flaws.