The lowest rated starting goalie in NHL 15 was Buffalo's Chad Johnson at an 82 overall. But after him, the next lowest rating was an 84 overall for Edmonton's duo of Fasth and Scrivens. Then after those two, there are several people rated at 85 overall (too many to list). Lundqvist, Price, and Quick were the highest rated goalies in the game at 93 overall.
So NHL 15 only had an 8-point ratings spread separating 28 of the game's 30 starting goalies.
This trend doesn't seem to be changing for NHL 16, based on where they've rated the top 10 guys. I hope I'm wrong. There should be significantly more separation in the starting goalie ratings.