I think Paramount Orchid's label of "SS" means "seedling size", which is what you got for
V. roeblingiana. I can tell you right now,
V. roeblingiana is a fairly good sized Vanda. A small division can be about 8" - 10" across from leaf tip to leaf tip.
The
V. cristata is not flowering sized, yet...
Like
V. pumila,
V. cristata can bloom at relatively small sizes. Your
V. cristata, however, looks like it will be at least 2-3 years from blooming.
I wouldn't worry about the roots on the
V. cristata, they look passable and can grow new roots quickly during growing season (which happens to be now
).