It's BI now instead of BCi because the scientific classification was changed, lots of us still use BCi simply because it's what it's been for a long time.
Richard covered the albino strains pretty well. There was a surinam BC albino years ago but they never got young from the breeding. Some people bred BC strains into BI albinos to color up their lines which is a shame IMO. anyways almost all boa morphs are BI. There are a few that are crosses with BC like Roswell, Lucy/Fire/Diamond and a few others (not all confirmed but suspected). Some morphs come from CA (central american) localities like the majority of Hypo/Salmon, Motley, Leopard. These are commonly bred to other BI localities.
There's a lot to learn but not as many morphs as ball pythons, don't let it overwhelm you and feel free to ask questions!
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