Rwanda and Ethiopia are more like China. Kenya, SA, Nigeria etc have taken the western democratic model. Going by empirical history, no system is better than the other.
Interesting view. When I have some time I will list the successful countries under each "model" and see which list is longer in the "empirical history".
I would also distinguish between the nominal "model" and the "model" in practice. The "autocratic" model has been well tried in Africa---most of post-independence history---even when the countries in question were supposedly working with the "western democratic model". It has always ended in blood and tears. Countries like Kenya are simply working, somewhat haphazardly, at returning to what they (as in their "leaders") rejected for many years.
And in comparing some African countries with China, I would also note this: China's leaders serve "fixed" terms; new leaders and new ideas come in at regular intervals. No "president-for-life" and all that goes with it.