I've got Sawchuk pegged as a better technical goalie than Dryden.
I don't count Dryden's Vezinas as much because they were essentially Jennings trophies, and you have to downplay his accomplishments at least a little due to the best dynasty in NHL history playing in front of him.
Seriously, would Rogie Vachon have done any less with Robinson, Savard, Lapointe, Gainey, Lafleur, Shutt, Cournoyer, and Lemaire in front of him?
One could just as well ask, would Harry Lumley have done any less with Howe, Abel, Lindsay, Kelly, and Delvecchio in front of him? After all the Red Wings did finish first overall in the league and won the Stanley Cup in 1950, the year before Sawchuk became a starter.
In contrast, the Habs always finished high in the standings but did worse before and after Dryden than they did with him, and took a noticeable drop in his one-year absence in 1974. Not to mention that between 1970 and 1985 a consistently strong Montreal team never won the Cup without Dryden in net.
How good was Sawchuk really during his peak? Here are the seasonal GAA numbers for Detroit's starting goalies during the Red Wings' period of greatness, adjusted based on the average level of scoring of the other 5 teams in the league:
1947-48: Lumley, 2.16
1948-49: Lumley, 2.36
1949-50: Lumley, 2.27
1950-51: Sawchuk, 1.96
1951-52: Sawchuk, 1.93
1952-53: Sawchuk, 2.15
1953-54: Sawchuk, 2.10
1954-55: Sawchuk, 2.04
1955-56: Hall, 2.12
1956-57: Hall, 2.11
Sawchuk was a big upgrade on Lumley, but did any of that defensive improvement in '50-51 come from Howe's first breakout season at the age of 22 or the maturation of the 23 year old Red Kelly? It's possible. Notice also how even as a first year starter Hall picks up pretty much right where Sawchuk left off.
Another thing is that Sawchuk's five best years were against a very weak crop of goalies, the cohort that bridged the gap between the retirements of Broda, Brimsek and Durnan and the emergency of Plante, Hall and Worsley. Playing on a dynasty against weak goalie competition in a 6 team league, could it be that his environment made Sawchuk's prime look more dominant than it actually was?
I think Sawchuk was very good in Detroit, but I don't think his peak was the best ever by a goalie. He definitely got a lot of support from his outstanding teammates. The hardest thing with him is reconciling his stats with his excellent reputation. No doubt he had terrific skills, but at the end of the day isn't it really performance that matters most? I'd probably rate both Hall and Dryden ahead of Sawchuk.