Hey Brian 
Thanks for the nice comment. Perhaps if you had been a judge at Baycon, my model would have won an award-it received nothing! One of the judges thought it was a fishing boat, the other said it was the Lindberg plastic kit and wasn't weathered enough. Apparently, the judges can't read the entry sheet stating I was a former crewman and it was scratch built. If it ain't gray with guns it don't get any love at Baycon...
As for your observation, the ships are twins...both were built to the same design, same length, same propulsion, tonnage, etc. The only difference is the "tripod" mast on my ship (the 613), was an experiment that was not repeated on any other American lightships. The 612 was purchased from Ebay by a husband/wife lawyer team. They were going to turn it into a law office on the Boston waterfront, but opted for the "luxury" treatment. It's a load of money to keep a ship or boat "in paint", perhaps more than they realized, it's for sale. My ship, the 613,is for sale, it still looks like when I was a crewman aboard her.