my best guesses are Alma Potochke
I have had the plant Deb, I does look like that one to me, though I don't know the other you mentioned.
I gave it to my brother who has a bigger land and it grew very tall, unfortunately don't have pics of it it, just one close-up of the flower when it was still with me.
The colour changes a lot according to the light, the camera settings too, this one was taken in the warm evening sunlight..
It had the label: "Aster novae-angliae 'Andenken an A. Pötschke' "
