Cd, I just went out in the shop, I have Burmese Teak, Honduras Mahogany, Red Oak and American Walnut.
I did the finger nail test ( just to see if I was loosing my mind ) and the Teak and Mahogany and Am Walnut are very close in hardness the red oak being the softest of the bunch
I too have worked with Hardwoods for awhile myself and I going to have to disagree ( most respectfully ) with ya.
1978 Tayana 37
1955 Blanchard 51 Custom ( I got a woody )