Dam you too tempting. I just got an XL in Nov...
Better 3D
Second stick
NFC built-in
Coloured buttons
More buttons
Better battery (up to 7h)
Now compatible with microSDCard
You can back up data on your PC via wireless.
Browser improved, now works with HTML5
CPU improved, makes browsing Miiverse / eShop much faster.
Can switch designs now (covers)
EXCLUSIVE AAA Games.(Like Xeno)