Yes, this latest one is an Oriental-Trumpet ( OT ) as well.
As to exactly what name or cultivar; hopefully somebody will recognize it. There are so many 'pinks' with OT's that it gets kind of confusing.
But the first 'pink' you posted is definitely 'Robina'. When taking pictures of a lily, especially for identification, I would take the flower, the foliage, the stem and the inflorescence or flower head. See here, you can compare my Robina to yours with mine below. And, yes, your observations about Robina being darker and more intense in full sun is correct. The buds of quite a few OT's need a lot of light during the last few days of budding to develop full color. That's sort of a family trait of the Trumpet side of the family. Photos taken July, 2014
