maas
This shouldn't even be up for discussion! MIT brand wins in brand hands down. Sloan will always be one of those business schools that no matter the ranking it will still be in people's desired list. (More people apply to Sloan than Booth, and that says a lot since Booth has the highest acceptance rate of the M7 and Sloan one of the lowest).
Sloan is one of those b-schools that is always mentioned as "MIT Sloan", and not simply because it wants to take advantage of the MIT name, it is because Sloan is REALLY a part of the broader university and MIT lifestyle. Other bschools are a lot more separated from the parent university (pros and cons from that). So if you are a Sloanie, you really are a part of MIT.
If anything, the fact that MIT must always be mentioned before Sloan suggests that people might not immediately know what Sloan is unless you mention the parent institution. Regardless, it's certainly up for discussion given Booth is higher ranked in all of the MBA rankings, and this post is focused on MBA brand - not overall university brand, which I would agree goes to MIT. For that reason, MIT has the edge internationally, but I don't think it's clear cut in the US, especially among people in the know.