The new BRP backrest is adjustable. Also, there is a conversion kit available to modify the existing BRP backrest to make it adjustable.
Utopia is good, ,but I prefer the look of the BRP backrest.
A further advantage of the Utopia backrest is the removable purse that is mounted on the back, so that a passenger has a handy place to put things, such as lipstick or toll money.
I salvaged the removable purse from my 2010 Utopia and mounted it on my 2014. I had to fashion a cover for it and sewed it to the BRP backrest. What the hell, it was winter, and I had already skied that weekend so this helped keep my mind on summer.
When I get the part to make the backrest adjustable, it will be perfect. IMHO.