I have no data, but I find it hard to believe such measly numbers. The viewership in Asia itself would be upwards of 200 million (India, China, SE Asia, Middle East where football/soccer is popular).
Those numbers are actually originally sourced from UEFA so I would expect them to be accurate. I know the World Cup Final has hugely larger ratings figures but Champions League being a European tournament maybe it isn't very popular outside Europe.
I think that probably the Champions League, World Cup and Euro Cup final have much more viewers than the Super Bowl.