Huge difference.
Ford is not involved with any racing in the corvette's class while the corvette entrants are factory teams.
When ford does back a team, they finish 1, 2, 3 at the 24 hours of Le Mans.
In the world rally championship from 2000 to 2010, ford has won it two years in a row (2006-2007) and come in second 7 of those 11 years.
1985 IMSA GTO champion
1986 IMSA GTO champion
1988 IMSA GTO champion
1990 IMSa GTO champion
Like toyota, ford will switch focus from one series to another.