Ah but F150 is only a number. Well, with a letter. If I was Ferrari's lawyer I'd pointing out the difference between F150 and F-150... Anywho, the name is changed, from now on it's the F150th Italia. Still reckon it sounds a bit odd, probably sounds better in Italian :-D
This type of thing has been going on for years. Porsche's original 911 was originally the 901 but they couldn't use it because Peugeot had registered the use of the central zero for all of their then current and future models.