Corn that all have the same morph are still highly variable, so it is important that if you want a particular look, you are picky about which corn you buy. It is difficult, because they change so much from hatchlings to adults. Your best bet, at least until you get more experienced, is to go by what the parents look like and/or what an experienced breeder recommends. But make sure the breeder knows what look you are looking for, because what they think makes a great snake might be different than you.
The morph bloodred was named before they realized that the color wasn't as closely tied to the diffused gene as they thought. Diffused refers to the fading of the pattern as they age that results in the snake eventually looking more or less one solid color. It turns out that to keep that color, breeders have to selectively breed for it. People call the ones with that deep red color "old school bloodreds".