The Braintree and PayPal account structures are different. If your business is large enough to use multiple accounts, PayPal recommends that you use REST APIs or the Braintree SDK for all payments.
Does Checkout via Braintree SDK support multiple currencies?
What are the differences between Checkout Braintree Direct and standard NVP/SOAP integrations?
How do I get started with PayPal APIs and SDKs?
Why did I get result code 12 (TSYS platform)?
What are the differences among the Checkout payment actions?
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