Hey,
I probably am not much help, since I think species are at best like porn (you dont know it until you see it) or at worst like the ROUSs (I dont believe they exist) 
At the moment the "Egyptian" and "Kenyan" sands are subspecies. But, there is no good genetic data to say how different they are. So it really is a judgement call. I for one, dont think they are different subspecies since there can be and likely is gene flow in the wild.
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“There is a grandeur in this view of life, with its several powers, having been originally breathed into a few forms or into one; and that whilst this planet has gone on cycling according to the fixed laws of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been, and are being, evolved.” -C. Darwin, 1859
