Yup, we have several Polygonia species in Colorado and I am terrible at telling them apart. They all look the same to me (so does yours), except I guess they have subtle differences in the "punctuation mark" (I think we have one species where it's a question mark) and color of the underwings. I...cannot really tell. They're pretty, though! I love their wing shape--they look like jaggy pieces of bark when they close their wings.