That event also benefitted from a proper Sabbath reunion, the hometown boys reunited after 20 years and there was great marketing, a special event with current and legacy stars.
That can't be compared to Kiss who just did the last show of the tour in New York, that is more comparable to the previous "last show" at Ozzfest which nobody remembers.
That said, Ozzy IS bigger than Kiss and connected with a larger audience outside of music due to his persona in The Osbournes. Also the hometown factor - Sabbath are from a big city but it doesn't have much of a global brand, so a successful band like Sabbath is a source of local pride much more than any band from New York can be - NYC is its own brand and Birmingham isn't. Half the people probably think it's in Alabama.
