Yeah not a big deal, just clarifying.
We've only begun to have success w/ some of the more difficult species now that we are beginning to understand how to treat them, so many vendors did not even carry mags or gigs or mertensi, so many are just not very aware or very familiar w/ them.
I say many can color up similar as heavy actinics or even just all blues can make most any anemone color up even if they are bland in natural daylight.
As for picking an anemone, decide if you want rock, or sand dwellar, also decide what clowns you want to keep, because we are finding better success w/ natural host matches, clowns to nems as found in the wild.
So for example, mags like rockwork, and they are natural hosts to percs and occs, so that's a nice combo, and mags can come in colors similar to what you posted.
So for me, wanting a mixed reef, w/out wandering issues, and percs being my favorite, this is what I went w/ and I scaped my tank to meet the needs of the mag, high perch for light, and once I put her there, that's where she stayed, and my percs were quick to accept the mag being a natural host match