Yes, the Vancouver Canucks are better because they have had more success over a long period of time. The Canucks have a much larger fan base than New York. In Vancouver, people eat, breathe, and live hockey, while it is not as popular in New York. The Canucks are strong players are always finish well in the standings.
The Vancouver Canucks are better than the New York Islanders. The Vancouver Canucks haven't won the Stanley Cup, but competed for it three times - in 1982, 1994 and 2011. The New York Islanders have won the Stanley Cup three times - in 1981, 1982, and 1983. They also competed for it one other time. I still think that the Canucks are better because they are doing better this century than the Islanders.