10 days - Austria, Czech + Deciding between Budapest/Bratislava/More days

I am a solo traveler. I will be flying into Vienna and flying out of Prague. Wondering which of the below itinerary is better or more efficient

Option A:

1 day in Vienna > 2 day in Budapest > 1 day in Vienna again > 2 day in Salzburg > 4 days in Czech (Cesky Krumlov, Prague)

Option B:

6 day in Vienna/Salzburg (+Bratislava?) > 4 days in Czech (Cesky Krumlov, Prague)

The period I will be there is Christmas Eve till the first 3-4 days of 2027. The cities I want to visit for sure would be Vienna, Salzburg and Prague.