The first is a Dendrobium, but with so many hybrids on the market hard to be more specific. But it looks like it has alot of Den bigibbum species in it's background. The last one is likely Burrageara Nelly Isler. Burr. is an intergeneric hybrid.
I have no clue, but what I do know is that if the the last one is Burr then that is an intergenric cross between Cochlioda x Miltonia x Odontoglossum x Oncidium.
This would translate to high light, lots of water and fertilizer while in growth state (new pseudobulbs) and a mild rest (a bit of drying) during maturing stage (usually winter for Northern Hemisphere.) I would never recommend a complete drying at any stage.