Paph spicerianum
 

Here are 3 photos showing what line breeding is all about.

The first flower is from a wild collected plant, probably collected sometime in the 1940's or 1950's.

The second flower is an Orchid Zone bred plant, from about 10 years ago.

The last photo is a Lehua plant, which bloomed for the first time recently. Based on the broad petals and enlarged staminode, this plant might be a spontaneous tetraploid mutation.

All are very cool, interesting changes through the years.

Are there differences in things like ease of growth, vigor, disease resistance, cold/heat tolerance?

I don't like the certain modern breeding.
They look nothing like how spicerianum is supposed to look like. I don't see the point of making everything round and flat.
Noooooo!!!!!!! ;)

I like spicerianum as is the first picture. They look so unique and beautiful that way.

By the way, Colman picked up a nice specimen with six flowers from you yesterday at the show, while I was busy over at the other end.
I would have gotten it if I saw it first. hehehe

Well said NYCorchidman, couldn't agree more.