As I understand it.... You can have SV add a humanize function to the vox which varies the voices in subtle ways so it's not a midi perfect replication rendered by different voices.

I've not used it myself since I rarely do harmonies in the way you show in your example.

So far.... I tend to use 2 harmony parts rendered by BB harmonizer and have them nudged in my DAW, panned and placed low in the mix. It's cheap, quick, and works for my needs.

Your example is really nice BTW. Something I might have to play around with.

You can find my music at:
www.herbhartley.com
Add nothing that adds nothing to the music.
You can make excuses or you can make progress but not both.

The magic you are looking for is in the work you are avoiding.