Chis your "ill informed". All of the voice actors are the same as the main OVA in Spiral Labyrinth with the notable exception of Yang. Who is now played By Hozumi Gouda who is best known for his role as Chirico. This is the case for both gaidens actually. Damn I totally got ninja'd on my question too!
No, I'm not ill-informed. The voice actors in Golden Wings are all different, except the narrator. No one said anything about Spiral Labyrinth.