I had to get the Chosera 1K due to all the publicity. I'm still not sold that it is better than the Shapton GS 1K. It does have a different feel to it & that feel may be preferable to some. Both are at the top when it comes to straight razors, but I'm not sure if one edges the other out on the "better" stone. The Shapton GS system is my "go to", but there are times I will use the Naniwa SS's.
If I am using my Chosera 1K, I'll usually follow it with the GS 1K, then progress up the stones. For me, staying within the "system" works best...especially when it comes to the Shaptons. The Naniwa system is about the most forgiving system I know of....