Tough call but not due to any particular love for either character.
Mme. Razz would add a unique silhouette to my line-up while having a style that would still belong beside the barbarians & glamazons.
Scorpia is Horde with traditional Horde logo, she adds to their ranks and uniformity.
If I had to pick one I guess it'd be Razz just for some variety & I've decided to ditch her Filmation persona and to make her speak like Snoop Dogg in Mytheria/Myternia.