My 2014 (#24) came with the yellow rear coil and I thought it was a bit stiff, so I got a red one and tested them both side to side while they were off the shock. I was surprised by what I found, so I re-tested 2 more times and got repeatable results.
https://farm1.staticflickr.com/958/2...c22b5739_k.jpg
https://farm1.staticflickr.com/907/4...00a9e1c9_k.jpg