I got this today. If you had fun with the first one you'll love this one. So far it seems like a better game. Customisation for Mii characters, A better structured main mode last one was basically an arcade like "he's a group of events, do them" this one has training , days lay out instead of just groups so it feels more Olympic-like. Also rival interruptions, E.g King Boo interrupted me to challenge me to a one on one match.
Customisation seems pretty cool as you can buy Mii costumes and accessories to dress your Mii. Then there is equipment customizing where you take ski's , snowboard and bob-sleigh and customise the paint design ect.. using stickers , patterns ect... I don't know yet if you can customise and save multiple Mii's and equipment but I will when I get more money in game