Nod ref side to gdi base :
As it is GDI will have a much close base, Nod is more open and can be attacked from long distance.
Nod has some gameplay avantage Stealth (SBH ,ST) ,so it still can do a suprise infiltrate GDI.
I want to give Nod space for group of artys to attack gdi without been too short or too long road time also give a gdi posisbilty to sneak that Nod ref on that same side .