Really beautiful work Bill!
I think the heavy vignette works better with the B&W shot here... maybe if you lifted the vignette just hair higher, so it doesn't enter the top of the uppermost yellow petal of the main subject flower, I'd prefer the color more, but in its current state, it make my eye's whish for more light in the color version for some reason.
Hope that made sense, heh. Either way it is just picking nit's, both are sweet shots, just trying to differentiate between the two.
Eric