All instances of remittance-as-a-service are white-labeled by de facto. The payout partner is simply the settlement processor with which the solution provider is working (i.e. the countries in which they are working and the specific types of payouts they are able to do).
Whether you opt for the API and build your own app, or use the solution provider’s white-labeled app, it has no bearing on the payout corridor. They are offered as-is.
The list of payout corridors can be seen here: Payout Corridor & Rates