V-Flyer

Does anyone have suggestions re: leg room on economy on flights in and out of boston? Is there a difference between the 747-400 and the airbus-300 or 600 in terms of there being more leg room in the 61-64 side seats?
Any idea which are the most likely planes to be in service on the boston route over the xmas hols?
many thanks

Impossible to say which Aircraft will be on with any certainty, although stats suggest it'll be a 747. That's a good option for the back of the aircraft, since the curvature down the back gives you a bit more room that the Airbus.

Pix.