What's Wrong With My Cone Flower?

I have two kinds of cone flower by my front yard utility boxes, one is thriving and the other is on the struggle bus. My 'Prairie Splendor' is doing something weird, it looks like some of the flowers are blooming without pedals and the stems are dark. In contrast, my 'PowWow Wild Berry' keeps pushing out more and more lovely magenta flowers.

I noticed white fuzzy caterpillars on my 'Prairie Splendor' - that could be part of the problem. I also read that this kind likes dry to medium soil so it could be affected by our record-setting rainfall. Not sure!

Echinacea purpurea 'Prairie Splendor' not looking so splendid

This one flower turned out right, but what's wrong with the rest of them?

My utility box bed is looking much better this year. The Russian sage is doing great. I'm wishing I had a taller variety of cone flower to cover these two cylindrical utility boxes.

Echinacea prpureua 'PowWow Wild Berry'

Echinacea prpureua 'PowWow Wild Berry'

Perovskia atriplicifolia 'Little Spire' Russian sage