These are not really competitors
M-Pesa and MTN MoMo are payment rails. Zuma Wallet is an account that sits on top of those rails. When you top up Zuma from M-Pesa, M-Pesa still moved the money.
The useful question is not which to use. It is which one to keep money in.
Where M-Pesa wins
Agent density. There are M-Pesa agents in villages where there is no bank, no fibre and intermittent power. If you need to turn digital money into cash in rural Kenya, nothing beats it.
Universality. Every Kenyan business takes M-Pesa. That network effect took fifteen years to build.
Where MTN MoMo wins
Cross-market reach across West and Central Africa, and interoperability in Ghana that is genuinely better than most markets manage.
Where a super app wallet earns its place
Multi-currency. If you earn in Kenya and buy from Nigeria, M-Pesa cannot hold naira. Zuma Wallet can hold both and show the rate before you convert.
Escrow. Buying from a stranger on a marketplace, the money sits with Zuma until you confirm delivery. Mobile money transfers are final the moment they send, which is why marketplace fraud is so common.
Credit history. Wallet activity, ride history and repayment behaviour build a score. M-Pesa's own lending products do something similar in Kenya, but that history does not travel with you to Ghana.
Practical advice
Keep your everyday cash where the agents are. Keep marketplace, cross-border and subscription money where the protections are. There is no prize for using one app for everything if it costs you money.