I ran in my new 1600 over two days of last week, it being a replacement for my 2011 (one of the first registered) bike.
Changes:
(1) Unlike my original bike (and several others of the first batch of bikes to be released) this bike does not pull to the left.
(6) My original 11 plate bike had the 'egg beater' phenomenon , common to many of the first edition bikes which was never cured. The new bike does not have it.
Other than that, not much else other than it's white.