Yup, i mean for departure procedures, sometimes they have to
comply with destination country's laws.
So like for a flight to North America naturally will have more
strict procedures regardless of the airlines.
But you see, the problem is when you ARRIVE into singapore.
Passenger A and Passenger B came from the same city. Arrive
singapore the same time.
Just that, Passenger A use Airline X (singapore registered),
Passenger B use Airline Y (also singapore registered)
But Passenger A get check and Passenger B did not.
i am like passenger A and B, somehow if i fly "the other" airline,
i always get checked upon leaving the plane.
But using the other airline, i can just walk direct to passport
control.