Roberta summed it up perfectly. If you want an idea of what a mature bellina might look like, check this website out
Phalaenopsis bellina
One "cool" - or rather "useful" - thing I've noticed with those sequential bloomers, is that the spike will be the first thing the Phal sacrifices should it be unhappy. That's an easy way to know if there's a shortcoming in the culture.
Also,
but Kew ended the speciosa vs tetraspis debate in 2018. Phalaenopsis tetraspis being the first one that's been described, it is now the official name of the species, and speciosa becomes a synonym.