I just found the summer thread where this plant was talked about. It would not likely survive our occasional super wet freeze thaw winters.

The Echibeckia "Summerina" series supposedly flowers for 2-3 months, which sounds about average to less than average for Rudbeckias.

I have not had a disease issue with Rudbeckias, so that feature is not relevant for me. I'd be inclined to wait on this one to see what long-term hardiness is ("hardy to zone 6" sounds borderline in any case, especially as it sounds like this variety does not produce viable seed so you'd be out in the cold if it didn't overwinter).