CFA Franc != CFA Franc !

1 Euro (EUR) has the value of 655,957 Francs CFA (XAF). This conversion rate is fixed.

The banknotes however differ:

Banknotes in central african states like Cameroon are issued by the banque des états de l'afrique centrale (BEAC).

The ones used in western african states like Ivory Coast are issued by the banque centrale des états de l'afrique de l'ouest (BCEAO).

It won't work to buy something in a central african CFA state with western states CFA money and vice-versa.