The verdict
For a small Dutch or Belgian team, I'd pick Moneybird to run invoicing and bookkeeping. You get invoices, VAT and a clear view of what you owe. Then add PayPal as one of the payment methods if your customers want it. Moneybird lists payment connections for PayPal, alongside Stripe and Mollie, so the two work together.
I'd pick PayPal on its own only if you need to be paid fast with a link, you have no bookkeeping needs yet, or you sell mostly to consumers who trust it. It is not built for complex billing or Dutch bookkeeping.