I have ordered from this vendor.
Typically the "regular" rock flower anemones are tan or beige with white accents on the tentacles and a purple mouth. As mentioned above, these anemones tend to have very interesting physical traits. Frilly tentacles, etc.
They also tend to be much larger.
The ultra rock nems are generally collected from deeper water, and tend to be on the small size.
I have never seen an ultra colored nem in less than 30 feet of water. The tan ones can be found in inches of water in seagrass beds..