I don't doubt that it's going to be a superb instrument, just like the others I have / have had.
I'm sure their non-Brazilian is great wood too, but after owning a few basses without Brazilian, and now some with this wood, I have to say that the ones that had a Brazilian board, all sounded extremely well, while the ones without, some of them DID sound excellent as well, but some others sounded dull.
No doubt that craftsmanship is involved as well, but some of the ones that didn't have a Brazilian board and were built by other high-end luthiers, did still end up sounding quite dull.
In the end, like I said, I trust Roger's experience in the field for 100% and I know this is going to be another killer instrument. Heck, I even trusted him so much (and, I admit, the raving reviews he got and still gets), I bought my first Sadowsky without ever playing one.
Funny story: when my first Sadowsky arrived and when I took the soft case out of the cardboard box, I was like "Sh*t, they forgot to put in the bass". I guess I wasn't used to lightweight instruments