You would think I could just compare the photos from year to year. Does it look like the same plant? Is it the same name tag? Well, then it's probably the same plant. The displays differ from year to year, though, and it's not always possible to get a whole-plant photo to compare. Like, this year, it was pretty difficult to get photos of entire plants without incorporating neighboring foliage and blooms (and ribbons, and name tags, etc.) in the shot as well, so crammed together were many of the displays. And I don't usually keep the pictures of the name tags once they've served their purpose, so I can't look at those either. So I don't know.
I like to imagine they're the same plants coming back year after year, though. Sort of a hey, good to see you, how've you been, mind if I get your picture? kind of thing. Or at least that's how it feels from my end.1
Miltoniopsis Echo Bay 'Midnight Tears' = Miltoniopsis Woodlands x Miltoniopsis Rose Bay (Ref.)
1 I imagine the orchids think something along the lines of Oh, great, *this* asshole again.