By form I mean shape. One is more of the typical henry and the other is a bit different I think. The second one has more pointy pouch. and the leaves are narrower than the other one. Weird petal action as well, definitely an odd duck. But nothing outside of the natural variation of the species.

Paph. henryanum by
paphioman, on Flickr

Paph. henryanum by
paphioman, on Flickr

Paph. henryanum by
paphioman, on Flickr
skinny
Paph. henryanum 'skinny' by
paphioman, on Flickr
Paph. henryanum 'skinny' by
paphioman, on Flickr
Paph. henryanum 'skinny' by
paphioman, on Flickr