Yes, I replaced a B&W Sage with the Libra Colour, and used them for a bit side-by-side. Contrast (not sharpness) of B&W text is slightly worse with the color one, but not by so much that you'd notice it if you weren't comparing them next to each other. The resolution of actual color is worse, but obviously you can't get color at all on the B&W one, so hard to argue that this is a downgrade.
Unless you're a real contrast freak, I think most people would be slightly happier with the color than the B&W; but it's definitely not worth paying extra for.
Unless you're a real contrast freak, I think most people would be slightly happier with the color than the B&W; but it's definitely not worth paying extra for.