Hmm this is gonna get alot of hate but I honestly feel like Vitality have been extremely lucky on Inferno and Overpass this far. They won some 1 v x that should not be possible. So in conclusion Astralis is playing better and more tactical but Vitality have the luck on their side today.
If you don't believe this is just luck we can see in maybe 1 month when Vitality will lose to a tier 2 team. Mark my words