Maxxis 2.25", 2.4" (and 2.6" and some of the 2.1"s) are all supposed to be the 'same size' as it were, all* supposed to relate to one another in the way they are measured. The odd time I've seen a 2.4" advantage it was massive yes
*(on newer treads eg advantage, crossmark, ardent)
(Older sizing being some 1.9(5?)",some 2.0",some 2.1",2.35",2.5",2.7" (inc. High Roller, Minion, Larsen TT?, Ignitor)
Where IME a 2.25" Advantage is about the same overall volume (tyre+tread) as a 2.5" High Roller (2.35" High Roller about the same tyre volume (ignoring tread) as a 2.1" Advantage
Oh, and which continental sizing? Old teeny tiny volumes (eg vertical) or new ridiculously massive volumes? (eg Rubber Queen)