which sounds better?

i can only spare 6 days for my vacation. would it be better to go to hanoi only for 4 days (thu-sun) or hanoi 3 days(wed-fri) and kuala lumpur 3 days(sat-mon)? i heard there is a market open only on the weekends in hanoi , but i can't do kuala lumpur and then hanoi bc of my flight schedule.