Some of these posts make no sense.
Watch some Tampa games. He's not a product of them. You can also look at the stats. Their defense hasn't even been that good in recent years. They have a few high-end defensemen and their team is very good, but they've also iced some terrible defensemen like Sustr, Dotchin, etc. Their defensive core isn't that good. Maybe its close to top 5 now with McDonagh back to his best, but its not been that good prior to that. I think the Ducks defensive core in the time these two have been NHL goalies has been better than the Lightning's.
Both of these goalies are top five in the game. I'd rank them first and third in the NHL, so we aren't talking about a big difference here, but I still think Vasilevskiy has better talent and is more apt to stand on his head to win a game for his team.