The Keikendo Maturity Model for developing an organization’s UX capabilities

I saw the Keikendo Maturity Model of an organization's UX maturity and immediately thought of the paper by Jonathan Earthy that talks about the Usability Maturity Model. Comparing the two side-by-side:

Usability Maturity Model

Unrecognised -> Recognised -> Considered -> Implemented -> Integrated -> Institutionalised

Keikendo Maturity Model

Unintentional -> Self-Referential -> Expert -> Centralized -> Distributed

There seems to be a lot of similarities, and it also relates to the Nielson Group's Usability Maturity Stages 1-8. Aren't they all talking about the same thing, so why do they all need different names? I think we probably recognize the lower and higher levels of UX maturity, but there are more blurs when it comes to intermediate levels because of the nature of the different organizations.

Has anyone tried to apply/adopt this model with any success? Or does anyone have any opinions or ideas about the model compared to similar models?