I hate it to tell you, but they are quite bad examples of Pet shop koi. The only proper variety is the Yellow one which is a Yamabuki Ogon, but he/she has a very poor bodyshape. Probably a mature but still small koi who never had the opportunity to grow, and therefore will never grow very big.
On the other hand, beauty is in the eye of the beholder, and if they work for you and your setup, then, who are we to judge.
We have all started with low grade koi and it is actually good. It gives you the opportunity to learn pond husbandary before you loose money on expensive fish.
Sorry about that, but I have to be honest.
Anyway, thanks for sharing.
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Koi are not my whole life but make my life whole