To buy Enzo, you must be a big fan of Ferrari, and you can only buy Enzo if you own more than one Ferrari.

FXX was bought at the invitation of Ferrari, and the premise of inviting you is that you have Enzo.

FXX won't take you home.

FXX is actually just a model used by Ferrari to test.

The owner of FXX is just a tester in FXX. FXX allows car owners to integrate into Ferrari's team, and each FXX is equipped with its own team of technicians. All expenses and related expenses of galloping on various tracks in Europe are reimbursed by FXX owners, who only pay to enjoy the treatment and enjoyment (or torture) of professional drivers on professional tracks.