No honest answer exists in the abstract. Both depend on visa availability and on government processing that neither applicant nor adviser controls. Official Gold Card material describes portions of the process in weeks, which is a description rather than a guarantee. Compare the steps each route requires, not a promised finish date.
Ask what happens if the plan slips
A timing comparison is most useful when it examines failure. What would a two-year delay do to a business sale, a child's schooling, or a visa the household currently holds? Which payments would already be gone at that point, and which would still be recoverable?
Anyone who answers a timing question with a confident number, rather than a range and its assumptions, is describing a sales expectation instead of a process. Test the comparison against failure rather than against the best case. What would a two-year delay do to a business sale, a child's schooling, or a status the household currently holds; which payments would already be gone at that point, and which would still be recoverable.
Those answers are more useful than any projected finish date, because both routes depend on visa availability and on government processing that neither applicant nor adviser controls. Official material describing portions of the process in weeks is a description rather than a guarantee. Anyone answering with a confident number, rather than a range and its assumptions, is describing a sales expectation.