Before my basement flooded summer before last, I was building the Constitution to fit into a shadow box.
I was also cutting one apart to make the Constitution as drawn by Chappell. I had cut the hull down to the gun deck and built it back up with boxwood and styrene.
The Cutty Sark by far has very nice lines when finished. The only thing that I do not use on these models is the plastic ratlines for these seem to be the only parts that really stand out and look out of scale. I would either leave them off of make my own with wire, stretch sprue and CA.
Both kits are fun to detail. Yoy can cut our portholes and use PE rings and doors and other little odds and ends to dress the kit up.