Old Detroits (6V92 625hp) caused us to be afraid of rebuild costs (rebuilt one engine right after we bought her), and eventually was going to need a new paint job. So the equation was do we want to own this boat for another 10 years + to make economic sense of the two big, likely expense items. It was a 9-9.5 knot boat at 1 nmpg, 18 knot fast cruise at 0.3 nmpg, 23 knot top end. Weighed 75,000 lbs wet. Layout was great for entertaining and boat was very comfortable, even without stabilizers. 3 decks, lots of up and downstairs. Only went back to the slip twice in 12 years due to swells.
Nordlund is a bit more of a custom built, highly responsive 'sports car', weighs 38,000 wet, has ABT stabilizers, delivers 11.5 knots at 1 nmpg, 18 knot fast cruise at 0.78 nmpg (20 knots at 0.68 nmpg), 26 knot top end. More of a single level (not quite but close) boat. Designed by Ed Monk Jr and Tim Nolan. Engineered for weight and safety. 6 watertight compartments. Gentleman that had her built came out of Santa Cruz 52 sailing and the boat has some sailboat performance and design features. There is a nice Power & Motor Yacht writeup online, and Dennison broker video.
For comparison you can see Calypso, the Queenship 59, at boatbnb.com where the new owner gets $550/night as a unique hotel alternative in San Diego. The last known Admiralty model Queenship was a 2008 model. They are about 60 Admiralty models out there between 56'-68' (same hull, just stretched). Engineering is very good, as are system. I think there were only 2 completed between 2005 and 2008. Very nice boat with elegant interior