oh, i did not mean that Bishop's series and Mystic's were the same!
it should've read like this:
...it seems that D. 'Bishop of York' has a soft orangy cast to it.
whereas D. 'Misty Illusion' is almost the same [as D. 'Knockout'], may be brighter cooler yellow?
i also tried to find the final height on both. most sources state 1'-3' for height and 1'-1.5' spread. but it might depend on the length of the season/temps,etc. it would be interesting to see them side by side for comparison for flowers AND foliage..