2 similar A-bodies...which would YOU build and why?

OP REALLY needs to say what he's after with the build- that will decide which car to go with.
Cruiser? The Dart, hands down. Floor pans and a trunk isn't too bad to do, and it's already got good running gear.
Street brawler? The Scamp. With no drivetrain, you're already halfway there, and you can throw some tubs in it while you're dealing with the damaged quarter.
But, since the OP's question is "Which would I build?", I'm going to deviate from the masses (I've been called a deviant more times than I care to admit) and say I'd build the Dart. I actually don't mind the beakers. Are they my favorite? No. But neither is the Scamp. At heart I'm all about '67-'69 Darts, but the beaker has possibilities... down in the weeds, radiused/flared wheelwells with obscenely wide meats mounted on Minilite wheels, front and rear sway bars the size of my forearms, tear out the ratty interior and just leave it bare (or maybe sheet aluminum?), rear window retention straps, G3 and six speed with boom tubes, the whole ball of wax to end up with a '70s/'80s IMSA flavored build. And flat black.
Told you I was weird.