BW is a;ways cool especially for your Noir styling pics but the warmth of the colour version is more inviting as a viewer. I would probably try and make that shadow on the right more punchy and crop the dead space above. Crushing the blacks a bit in the colour version would maybe give the best of both worlds.
Inviting, me, no no no, then I won't do it 😝 I agree with you on that blacks as black in the bw and in the colour version a bit softer, I've found that to work quite well on other images.
I don't mean inviting in that! , just visually inviting into the image.