additional windows on the pilot's side
Possibly because the downward vision on the S76 isn't that brilliant so that the pilot can look over the side.. On the 332 doing a helipad T/O one has to have the take off point in view until committal which is easy with the lower cockpit windows.
One had to lower the take off weight on a 332 to do a helipad; about 400 kgs. I shudder to think how much penalty there would be with a 76; most pilots are used to throwing it over the side of elevated helipads.