Greg - the primary differences between the Tidioute and Northfield lines are:
Tidioute: Plain bolsters, satin blade finish
Northfield: Often threaded bolsters, mirror polished blades.
My dogleg does have drawn swedges and standard nail nicks. It looks like the Northfield versions have cut swedges and long pulls on the master. And if you want fancy handle material, like stag, you will have to get a Northfield.
It is my observation that the street prices for equivalent handle materials (both being bone or wood), on a knife of this size, will be about $10-15 more for the Northfield. It's up to you to decide if the threaded bolsters, long pulls, and mirror polished blades are worth that difference. They made my decision for me, as I would have bought the ebony version regardless of whether it was Northfield or Tidioute.