Hi1 I actually posted this in the Cambodia thread, but I think mas appropriate siya dito. Hope you can help me

I have 2 option. Which one is better? Also, for Cambodia and Vietnam what are the must see temples/places?
Feb23 Manila-Bangkok 06:25am
March2 Ho Chi Minh-Manila) 01:00am
Option 1:
Feb23 Arrival in BKK 8:45am, city tour
Feb24 Leaving for Siem Reap 6am Casino bus at Lumphini Park, arriving at 2-3pm
Feb25 Siem Reap, Angkor tour
Feb26 Leaving for Phnom Pehn Mekong Express at 8:30am, arriving at 2:30-3:30pm, half day tour
Feb27 Phnom Pehn, city tour half day
Leaving for Vietnam Sorya 4:15pm, arriving at 10-11pm
Feb28 Vietnam, city tour
March1 Vietnam, free time
March2 flight back to Manila 1am
Option 2:
Feb23 Arrival in BKK 8:45am, city tour
Feb24 Leaving for Siem Reap 6am Casino bus at Lumphini Park, arriving at 2-3pm
Feb25 Siem Reap, Angkor tour
Feb26 Leaving for Phnom Pehn Mekong Express at 9:45am, arriving at 3:45-4:45pm
Feb27 Phnom Pehn, city tour
Feb28 Leaving for Ho Chi Minh Mekong Express 8:30am, arriving at 2:30-3:30pm
March1 Vietnam, city tour
March2 flight back to Manila 1am
Thanks in advance sa feedback

** Also, sino suggest niyo na driver for Angkor tour? Sa Vietnam ba kelangan din to hire a tuktuk/car for us to visit the places? **