Ronix bill
 

What are the differences from the 2010 and the 2012?

Graphics I believe. If there were any changes, I could not detect them. It is a great shape for wake and park. It has been my go-to park board for most of the year.

the shape was changed.

The shape was the same through those years. It initially changed from 2009 to 2010. But from 2010, 2011, and 2012, they are the same shape just different graphics and colors. They just changed it again from 2012 to 2013's model.

Can anyone who's ridden the '10-'12 models and the '13 describe how they compare?

sorry i missread i thought he was talking about the 12 to 13 the new shape is awesome ive only ridden the willliam but it has the same shape and its awesome!