Sorry, but a couple of sites have them listed as the same genus. Therefore the same wood!
Look at page 7. Sorry, it's Adobe!
It is called (in several site sites) Brosimum Guianensis- Leopardwood/Snakewood common name Letterwood. Although Gilmer Wood calls Snakewood Piratinera Guianensis.
Look on my first post where I posted "edit". At the top of that site it spells it out.
I didn't make this stuff up, so don't take it out on me. I'm just telling it as I see it.