The big giveaway that it’s iroko is the presence of the white inclusions in the grain - some sort of silica compound. I’ve only ever seen that in iroko and teak.
You also mention that it is reclaimed - if it was originally some sort of interior joinery work like floorboards then that points to iroko. Keruing tended to be used for rougher work like packing cases or dockside timbers.
I will compare
Want me to post you a small block of iroko?
Looks like teak. Where's it from?
Does it smell like pepper, is it soft?
And that was the other thing that rang true to red grandis. Just get dust from cutting no real chips.It does not, it's hard.
Turns to dust when put through the router.