I had the exact same experience with seeds from Regal Peppers last year. They labeled it "Firecracker Pequin." I got both variations, with dark purple pods on both the plants. All flowers were purple, some plants had the purpled leaves others green and some even variegated. The purple plants had much longer pods, like a cayenne. The rest looked like the picture in the first post above. All pods ripened to deep red. I made powder from them. Decent flavor and heat but not remarkable.
This year I had several come up as volunteers. I'm letting them stay as decorations.