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The differences are subtle, this one's got deeper tone and more contrast. I'm not sure it is an improvement over your first attempt. I like the photo very much for all the transformation of liquid and light.

I agree with Nesster here. I am learning that a subtle change in settings can completely change the feel of the B&W photos. Especially one like this where there is flowing water. I am torn as to which one I like most, the first softer more flowing feel or the second with more contrast and detail. I think I lean towards the Reconverted. But Hanging on a pastel wall the first would win.
This is why I do not leave comments very often. I am just not qualified.....
Thanks for the link to Gregs conversion info.

The conversion steps do indeed add detail. As others mentioned I think the improvements are very subtle in this shot. I think I like this version better just with the differnces in the flood lights under the water.