I enjoyed them both, but found it interesting that though both use 2017 data, number 10 on the two lists using simple quantity (not percentage of population) is different.
I figured the populous colonies of Christian European nations (especially Catholic ones) would have seen a lot of conversion, with Ethiopia being the only one who converted on their own and Nigeria only seeing partial success in conversion.
Egypt has a sizeable Christian minority compared to other Muslim countries but compared to virtually every sub-Saharan African country which are almost all Christian they don't have very many.
Coptic Christians do make around 9% of Egypt which is around 10 million people...so Egypt would probably make it if this quiz was changed from top 10 to top 15.
Not sure the Ethiopia data is accurate. Another Wikipedia page (here) says it has a Christian population of 62.8% and a Muslim population of 33.9%. I could be wrong, but it might be a good idea to check the source again.
Its's helpful to know where the line between the mostly Muslim countries and Christian countries is. I wonder if African Tribalism and traditional beliefs would be a major religion(religions?) if not for colonialism of Africa.
Good quiz though.