ABN 1 was the kids boat, they launched this first and sailed across to Newport with the main team onboard, then built ABN 2 as a refinement of boat 1. ABN 2 was then sailed by the main team and called black betty, with the initial boat then being passed to the kids. ABN1 was very marginally faster in certain conditions, but a hell of a lot harder to control.
After ABN 2 was rebranded delta Lloyd etc, it was sold to Turkish owners and sailed from Ireland towards Turkey, with the cradles dismantled and stored 'downstairs' for the trip. It ended up being impounded in Greece for a short while