The 2014-2016 clusters should be interchangeable. The prefix may identify the firmware in the unit or maybe just the model year. This part number strategy is similar for all parts. I saw the same pattern on the head units (acm). I am 90% sure a 2016 cluster will work on your 2015. There were no significant changes in those model years. But, use a 2015 if you can find one.
The new cluster is identical except for the LCD display and silver painted trim around the gauges.
The odometer company requires a signed statement that you are not changing for financial gain. It is easier for a crooked seller to buy a base model cluster and replace the existing one if they want to cheat.