'15 Galaxy Blue AT to '16 WRB MT?
 

I'm keeping the 15 AT, Thanks!

I also did not really like the WRB that much so I went with the CWP. however, over time, I started liking the WRB due to the unique color that is only on Subaru's.

as for differences, I know that the 2016's have a reverse camera as standard. other than that, I am not sure if there is a difference; if you want more differences, I would suggest you wait until the facelift for the BRZ which is in 2017 I believe.