Should I cancel my September Qatar flights and go with China Air instead if planning 3 weeks in Korea?

Me and my spouse are going on a 3 week travel in South Korea from September 12 until end of September.

We bought tickets less than 24 hours ago, so we would be eligible for a full refund (except seat fees).

Our current flight would be BUD -> DOH -> ICN and ICN -> DOH -> BUD

With Air China it would be BUD -> PEK -> ICN and ICN -> PEK -> BUD

If you were in our shoes, what would you do?