There was only one competing model, the Boeing X-32, which lost a performance shootout.
The X-32 had the distinction of being one of the ugliest aircraft in recent times and, given the times (1999-2000) was given the nickname, "Monica." See below.
The poor aircraft was both fat and ugly with an open orifice that, ahem, only a Clinton could love.
A lot of people knock this outstanding project's looks. But I say when Disney designs a plane, it's always a winner, whether used in combat, or as part of an exciting ride in Orlando.