What I grew this year (according to Baker Creek) was Batavian Full Heart Endive michael kors diaper bag (which was an AAS Winner in 1934 and is "a superb salad plant"), De Louviers Endive, and De Meaux endive (pictured in the second photo). These last two are both the curly type of endive, and they are growing right next to each other. I have stared at them repeatedlybut fail to see (or taste) any difference.
http://archive.playossdev.com/node/7483
http://prejezdy.info/node/22345
http://www.climatesense.org/ClimateSense/?q=node/10966