It would be taking a chance...while sebae clowns are typically less aggressive, maroon clowns are typically *more* aggressive...added with the faction of there being two of them, I'd say be *really* careful with this. Maroons have those nasty cheekspines that make quick work of other fish. They go straight for the mouth of the other fish, and often, even if you immediately seperate them, the other fish will eventually starve/stress to death from the first battle.
The only clowns I've successfully mixed were a tomato and a maroon (maroon added last and *much* smaller) in 100gal. the only reason I even tried it was because a friend of mine was set on making his own pair of maroons (which eventually, we did, but after the one I put in my tank killed it's intended mate)