Poet comparison

What makes one poet better than another? I’m looking at a vase of: Angel Eyes Campion Chesterton Dactyl Felindre Milan Patois Sea Green
Felindre, Milan and Patois are different enough for me to separate out by eye (Felindre is big, rough and has a wide red rim; Milan is big and has a proportionately larger cup than the others, Patois has an exquisite lemon yellow flat cup with just a wire rim of red). The other five are really similar at first glance (heck, at second glance) with subtle difference in cup size and perianth shape and really minor differences in cup color. So what distinguishes a great poet from a group of nice ones? (Assuming they’re equally fresh and free from blemish?)
I’d like to take them to a show and then query the judges afterward, but real life has gotten in the way of this weekend. Though I’m studying the flowers and writing this e-mail when I should be working . . .
Kathleen Simpson WV