These three sets are identical except for color and the way the creamer spout was finished on the amethyst set. On that set the creamer spout is pulled down. Evidently anytime hand finishing was required variation emerged.
Hazel-Atlas made a cocktail shaker that has a similar pattern which is popularly called "Standing Rib."
Heisey's Ridgeleigh pattern is also very similar to this one but the glass is a different quality and the sides on the pieces have a dip instead of going straight across.
Please note that the amethyst set belongs to Rick Hirte and the Ritz Blue set belongs to Annie Shatrau.
