Slightly off-topic maybe, because I do think Hart gets in TOTD unless we win the Champions League this season, but...
I don't think there's any truth to the idea that Ederson is a weaker shot-stopper and don't think there's any reliable or meaningful evidence to back that up.
More likely, it comes from the media-enforced stereotype that ball-playing 'keepers are bad with their hands, popularised by bitter ex-pros like Peter Schmeichel who resist the change to their ex-profession and aggravated by the exploits of Claudio Bravo and Loris Karius. In fact, Ederson has shown on several occasions that he's easily capable of stunning saves Hart would be very proud of.
It seems to me that Hart let in as many, if not more, soft goals per season as Ederson has been doing. It's well known that Hart was poor low to his left side- Ederson has no such weakness. A club legend he may be but I think his shot-stopping superiority is primarily imagined as a result of nostalgia and amplified by a reluctance to admit he wasn't as good as we remember.
And that's only mentioning before he left us. If you look at the library of embarrassing mistakes Hart's made since joining Torino, any suggestion that he's more reliable with his hands than Ederson becomes laughable.
After all, how many times in the last few years have you seen us concede a goal and been sure Ederson should have done better? Forget the mistakes against Shaktar and Liverpool because they were misplaced passes that had nothing to do with shot-stopping. How many can you think of? Two? Three? Not many, that's for sure.
Ederson is a vastly underrated 'keeper- because he plays for us. If he had replaced De Gea at United in Summer 2017, with the Spaniard going to Real Madrid as was expected, the UK media narrative would be that Ederson was the better player.
I'd also like to point out that Ederson faces far fewer shots because we have one of the world's best defences now, not Demichelis, Lescott and co. Therefore Ederson will never have a Dortmund game or a Real Madrid game.