Difference between bundles
 

I am curious what the difference between the Pathfinder RPG 2015 bundle and the Pathfinder RPG 2016 bundle are on the additional data packages page. Does the 2016 include the same books as the 2015 along with anything additionally released in 2016?

Thanks for any info

The yearly bundles only contain the items published in that year.

It just provides a way to have all the items available on your license without having to purchase them individually each time a new item is released.