Some of the hatcheries mention they deliberately 'mix the flocks for a variety of color'.
Your girl at top seems to be about the most common color of hatchery stock, basically either a buff or reddish with black tail. Black ones aren't too rare, most of them do leak color somewhere on them like your other girl.
Also another thing, the hatcheries(and to be fair, a lot of private breeders too) don't seem to select for birds pure for the naked neck gene. Your girl in first pic is pure for it, the second one is not. It can be seen by the bowtie size difference.. birds pure for the naked neck gene can either have a very small bowtie or a totally bare neck.. although totally bare necks(no bowtie at all right from hatch) seem to be uncommon.
Now, it's pretty often said that only the ones totally bare necked are the only ones pure for the naked neck gene but this is not true. For example, if you bred the first girl with say, a RIR, 100% of the offspring will have naked necks.. but the bowtie will be bigger. The second girl, on the other hand, will throw 50% naked necked and 50% not if bred with the same RIR rooster(or any other not naked necked rooster).
There is a show standard for Naked Necks. It is possible to breed for birds matching the standard, if one gets lucky with getting birds of an accepted color.. just select birds with yellow legs(standard calls for yellow legs). I can't remember if the standard allows for black tailed reds, but if it does and that girl has yellow legs, well she matches the standard.. (most hatchery stock have green or blue legs though. Green is halfway there- it's a combination of yellow skin plus leg pigmentation.. get rid of the latter and presto, you have yellow legs)
Now that's been all said.. a lot of hatchery stock turkens are actually nice birds, with personality and/or being productive layers and roosters can be rather heavy/meaty. Your girls are very pretty IMO!