I put a Corbin w/Ovalback on my '15. Actually got the backrest for my wife. She hated it.

I bought her something else and moved the Ovalback to be my backrest and found out why she didn't like it... feels like a boulder! It's hard as a rock and doesn't move (like Utopia) for comfort.

Don't know about the "Standard". Could never get Corbin to answer any 'after-the-sale' questions. Horrible customer relations!