there are a lot of differences between old and new boats, but traditions want to be lifted :) the shapes of the hull, the layout, the materials... everything is different on these old boats but with money you can bring them closer together.
If you spend a lot of money you can have something like the overwinning :-P I think this ship sails equally fast as a modern yacht but in general: new build yachts are faster than traditional sailing ships.
keep the questions coming - no a problem what so ever :)