I don't know exactly about what stats you guys are talking about but Inter managed to win in Munich and draw in Barcelona, not too many teams would be able to do something like that. PSG have beaten Liverpool at the penalty kicks, than Aston Villa, which are a good team but no more than that, and yes, they did well against Arsenal. I am more impressed with a team that beats Bayern Munich and Barcelona rather than Liverpool and Arsenal.
Inter is way on the different level. They beat the winners of La Liga and Bundesliga that can't be compared with PSG, which was beating the weaker teams than them. So, it totally makes sense to argue Inter is clearly a bit better, though the odds said the opposite. It only reminds me with Europa League final when Tottenham gets bigger odds, but win its first european trophy.