I have the 'Kwanso' with variegated foliage I received Sept. 2017 in a daylily trade. It stands out amongst the 20 other varieties growing around it because of the unusual cream and green striped foliage. The flower is the same as my regular 'Kwanso', tall and double. The foliage is evergreen here in zone 9 and the plant blooms in mid season, June/July, like my other 'Kwanso'.
I have a lot of this variegated Kwanso and I love it - except when it reverts to green which fortunately is not very often. It is still a runner though and each year it puts up foliage of different proportions of white/cream to green.