Yes, both of these pictures are of the same guy. To the right is how he looked when he boarded Air Canada flight AC018 from Hong Kong to Vancouver. The picture on the left is what he turned into.
According to CNN, the Canada Border Services Agency issued an alert about this "unbelievable case of concealment" on the October 29 flight:
"Information was received from Air Canada Corporate Security regarding a possible imposter on a flight originating from Hong Kong," the alert says. "The passenger in question was observed at the beginning of the flight to be an elderly Caucasian male who appeared to have young looking hands. During the flight the subject attended the washroom and emerged an Asian looking male that appeared to be in his early 20s."
After landing in Canada, Border Services Officers (BSOs) escorted the man off the plane where he "proceeded to make a claim for refugee protection," the alert says.
The cardigan is an especially nice touch. This guy's defence should really be that he had come up with such a great Halloween costume this year that he wanted to get the most out of it.