Ooops! I forgot a sorrel or chestnut is one that's mane is the same or lighter than their coat. I wish I knew what that mane color is called tho, hehe...
I'm sure someone will be along to explain the mane, and how it is or is not related to the sabino thing going on. Sorrel vs. chestnut....genetically, they are both "red," and indistiguishable on a genetic test (and one horse can vary in shade from one to another through the course of its life). But I suspect that there are additional, yet unknown genetic factors at play that influence the shade expression, as related horses seem to be the same color.
Overseas, all red horses are called chestnut (with some exceptions, for example pale Belgians being called "blonde," etc.). Among stock horse enthusiasts in the US, though, horses with more brown/yellow coats are called chestnut, while red/orange ones are sorrel--at least that's how the breed registries define them. Mane color has nothing to do with it.
BTW, Bubba13, I was relaly impressed with ur art! You make me wanna take up the hobby again!
Thanks, but there are a lot of talented artists here, some of whom really put me to shame!