Just remember that the 3 species once all grouped under the name Curtus have gained individual species status.
There is enough confusion in the world surrounding what species is which
For what its worth, Borneos and Blacks aren't called Bloods at all
There are the Python Brongersmai, aka the "Bloods"
Then Python Breitensteini aka Borneo's
And lastly the Python Curtus aka the Sumatran Short Tailed Python aka the Blacks
I breed Bloods and would be more than happy to answer any questions you may have. I will say that you seem to get what you pay for with these animals and buying CBB is the only way to go.