Euro Area vs West African Economic and Monetary Union money supply

One of these economies has no trustworthy USD conversion, so the levels cannot be compared. The growth rates can: 4.7% against 11.9% a year.

"So the bigger number is the richer country?" No. Broad money counts deposits and currency outstanding, not wealth, not output and not purchasing power. A country can have a large money stock and a poor population, and the reverse. It is also not comparable to GDP, and the two series here are measured on different dates by different agencies.