Long petals, short petals. Skinny petals, wide petals. Single color, bicolor. You name it, we saw it somewhere in the garden this year.
The red ones likely came from a seed mix a few years ago. They started in a flower box and are now spreading on their own and may be intermingling with the native, solid-yellow, rudbeckia hirta. I think they’re called “gloriosa daisy” though which specific variety, I’m not sure; perhaps there are more than one, which is why there’s such variation.