I think it's so cool that you have two mixes! I heard that first one and REALLY liked it. Then I heard the second one and REALLY liked it! ha! Big help there, right?
One thing I am curious about, the first one the harmonies don't seem as smooth as the second. Where they done differently, or just mixed differently, or...am I just off?
For the first mix, given the strong vibrato, I would recommend singing the lead a second time with no vibrato at all. Then use that track to generate the harmonies, leaving the second lead out altogether. It may give you a smoother result

Moving on, this is a cool song! I could see someone like KT Lang wanting to do this. It's just such a great feel.
Thanks for the share!