Yeah, breeders like to give various names to grade their shrimps (all the fancy names start coming out)... but in general locally, when we see LFS label their shrimps, the sakura grade ones are like the photo that SwordZ posted (shell color are in speckles and still have transparent areas), while the fire red grade ones are like the ones you posted (shell color are solid), whether they are pinkish soil or reddish solid will depend on the source.
Here is a common RCS grading guide that most people base upon:
http://www.aquaticquotient.com/forum...re-Red-Shrimps
Note that when you see photos of shrimps on the internet, their red color also depends on the tank lighting, the camera's color balance and photoshop color filters used, it can make pinkish shrimps look dark red and vice versa.
Quite often i see nice fire reds in LFS tanks, but when i net them out into a container, their color tun out to be pale red... thanks to those "color enhancement" shop lights.

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