Vintage= old, but classic applies differently with age. Most members over 60 have a different view of classic compared to a 40 year old.
I recently posted an italian race bike that garnered zero interest. The bike is rare, full campy, and a unique carbon aluminum frame. For me, with the bike being about 20 years old, the drivetrain and frame are dated. Being a high end bike with a connection to the pros makes it an instant classic.
Overall, the C&V forum loves steel Gitanes, Peugeots, Schwinns and then Italians. If anybody finds an old Gitane there will be two pages of posts the first day.