The verdict
Ask your accountant before you compare features. If they already work in Exact Online, pick Exact. If they run their practice on Twinfield, pick Twinfield. That is usually a stronger reason than any comparison table, and switching later means migrating history. If your accountant has no preference, I'd lean towards Exact Online for a small Dutch business, because its feature set is easier to see and it adds AI agents for the dull jobs. Whichever you choose, check how it handles bank connections, VAT returns and the API, and ask for current pricing.