There is a competition between Mason and Emery to see who can flip the most heads. They are both given a freshly minted quarter and flip their coin 10 times.
Mason gets 4 heads. Emery gets 7.
Do you think Emery is better at flipping coins? Do you think there was a malfunction at the mint and he got a weighted coin? Is Mason just having a bad coin-flipping day? There is no such thing as a consistent goaltender. It's the in nature of the game that save percentages over a handful of games will vary wildly. Emery has only played a handful of games.
Emery is probably not as good a goaltender as Mason, but I don't think just posting save percentages is useful here. Maybe the Flyers have happened to take more penalties when Emery is in net? Maybe some of those penalties resulted in 5v3s? Maybe defensemen have broken their stick 6 times while Emery is playing and only 2 times while Mason was tending?
There's a million things that could have happened or not happened to cause a disparity in save percentage like that; it's entirely possible for a difference in save percentage that large even in
equally talented netminders.
5v5 Save Percentage since 2011
Goalie|Sv%
Steve Mason|0.9180
Ray Emery|0.9121
Ilya Bryzgalov|0.9193
Adding Mason's contract to Bryzgalov's buyout, Philadelphia basically spent $37 million dollars to make a lateral move in their goaltending.