Tune Bobo 1 1/8 HeadSet
I believe both the Bobo and Bubu are standard headsets, the difference is that the Bubu is semi-integrated. As I understand the Bubu design, that means it still fits (presses) into a standard 1.125" headtube, but sits very low (is that called stack height?). I think this allows one to use a fork designed for integrated headsets without it looking funny at the crown / headtube interface. The Bobo will install and look more like your CK headset.
Having said that, I would not change from your CK headset. There is nothing better than the CK in standard headsets. Long term and off road, trust the CK. It is not the lightest, but it will provide years of duty with no fuss. In my mind, the focus on lightweight at Tune is higher on the priority list than bombproof. Chris King manufacturers headsets to the highest tolerances at a very competitive weight, when you consider that you will have zero problems with them.