What one loan actually changes
A card minimum is usually 1% to 2% of the balance plus that month’s interest, and it shrinks as the balance falls. The interest is charged on the full outstanding balance at the card APR, which is why a 20%+ card can keep a balance alive for decades.
A consolidation loan replaces that with one fixed payment built from the quoted APR and a fixed term. The payment stays the same every month and the balance reaches zero at a known date, so the total paid is an exact, end-to-end number.