Probably close, currently. Especially with the Chinese sucking up all the Dalbergias they can find while we are CITES limited.
However, through history Afr. blackwood was the preferred wood because it is more stable, turns better, and smells good to boot. Around the end of the 1800's/beginning of 1900's i believe ebony was quite a bit more available.
Wood/lumber has trade patterns (in past history) depending partly on use. Naturally where it growm, ebony was used for black, hard wood. But places like Scotland & Ireland preferred to import African blackwood for pipes because of many superior attributes. Other areas with concentrated wealth like Paris imported it for all the over the top furniture.
In the US both were imported for luxe items, but ebony was probably more accessible and cheaper at the time. Think of all the piano keys starting around 1840, until they began dying other woods in the early 1900's as even ebony began to get scarce.
Anyway, i suspect the butt you show is African blackwood, IMO the superior rosewood. Unless you like the deep red of Brazilian. Your's does not have the color (red with black marbling) of Brazilian.
When i still made planes, I used Afr. blackwood for the totes, but it got too hard to source the wider stuff, compared to ebony. the last few i made had ebony totes (handles) but it is not near the quality of blackwood. Blackwood is tough. Ebony is brittle. Another thing, Blackwood dries better, with less de-grade. I sometimes wonder if thick ebony ever stops drying, lol. These are Afr. blackwood, though a couple in the photo-within-the picture are Cocobola