The Sebring Speciale isn't listed as a "Speciale" in the official entry list and looks just like a standard Fulvia HF, but since the car was entered in a prototype class and that it's impossible to get close to the real car's 1967 qualifying lap time when driving a standard HF Fulvia in game, I have come to the conclusion that it must have been a "Speciale".
The Sebring car had a yellow painted front and rear while the Targa Florio car was painted blue in those areas. Screenshot from a YouTube clip...