I was watering the orchids this morning, and inspecting the Neos for new roots and growths. I had not noticed before that on Yoroidoshi, the newest leaves on the new growth look a bit different. One has marginal striping, and the one above it also has a yellow edge (but paler and the color doesn't come out well in that photo) as well as seems to be tiger stripes.
Edit: further look at that growth reveals that all the leaves have some smidge of yellow somewhere!
If it is a mutation, and a stable one, that would be pretty cool as I have just 7 Neos and have had them 6 months max.
The markings on this leaf don't come out well on camera. They aren't very bright, but do show up better than this to the naked eye. There are other stripes further down the leaf as well.