I can provide an updated review on my experience with Chickory Greens verses Italian Dandelion greens here in North Texas near Dallas.
While the heat is always a challenge in the summer months. here in North Texas, I have been able to trim green leaves from both Italian Dandelion and Chickory all summer. Both were planted in raised beds. Chickory was planted in full sun with a heavy 5 or 6 inches of shredded cardboard mulch. Chickory is hairy so the cardboard mulch also provided protection from getting dirty. No bug issues with either. Italian Dandelion had more shade just because of the shape of the backyard. No mulch around Italian Dandelion. They have smooth stems and are easy to clean.
I like bitter greens. They seem to be very healthy with a number of health benefits. Chickory leaves are bigger than Italian Dandelion. Italian Dandelion leaves are large, but narrow with long smooth stems. Chickory has deep roots which helps in the Texas heat.
Rabbits like both plants. However I have seen no bug issues with either Chickory or Italian Dandelion. I like bitter greens and these two are my favorite garden plants along with onions, garlic, and garlic chives. It looks like with the brutal heat of North Texas, these two greens allow consumption year round.except in the winter months when I can switch over to Spinach. Spinach does well here in the colder winter months while bugs are not an issue. I think I have found the best options for fresh greens in North Texas all year long.