The Common Mistake
Comparing only nightly hotel rates hides transfer spend and lost day value. A cheaper hotel can still produce a more expensive stay once ferry, taxi, and timing are included.
For this trip, include transfer cost and transfer time as first-class inputs in every comparison.
Phuket Bias
Phuket usually wins when flight timings matter and you want backup options. It has stronger flight frequency and wider accommodation spread.
Room pricing can look higher, but smoother logistics often offset this for a short window.
Krabi Bias
Krabi wins when daily pace matters more than nightlife and you can tolerate fewer transport fallbacks.
If weather changes your activity plan, keep one flexible day and avoid chained prepaid excursions.