Its only jagged on the edges cause of the white from the belly
But the color/pattern is not really rare. Just that you usually only see that clarity in purebreds. Most DSH's are kinda pale, mismarked; but once in awhile you have a very stricking "purebred" type of pattern.
One bicolor I owned, Muffin, was a perfect 50/50 split on color. I had many American SH breeders that commented on her pattern and how "ideal" it was for the standard; but Muffin was mixed and spayed.
Almost got to adopt a VERY stricking red classic tabby/white DSH. Even in purebreds you don't always get a nice clear, deep color/markings.
You might think about showing him in one of the associations in the household pet classes (as long as he's neutered and not declawed). I'm sure he would do well