Sadly, the top case is not interchangeable with the 2015 and 2016 models. The 2015 trackpad doesn’t work with the 2016 model. You can sure try though, but in my experience it has not worked for me.
Before people start calling me out and downvoting this post, I have tried this repair myself and it has not worked for me either. The trackpad didn’t work when I put it in the 2016 model.