Both of these colors are stunning and versatile. The aubergine strikes me as a neutral, kind of like Hermes Raisin. It looks to be a very subtle brownish-purple. I don't think you can go wrong either way, but the aubergine is very striking and unique.
Thank you, that colour reference was really helpful. It did send me down an amazing rabbit hole of Hermes purples and musing on that Evelyne that got away, but I can see through others eyes that this is a 'serious' purple for want of a better word, which is what I'm wanting

Also there's nothing like a trip to Hermes Land to make Givenchy prices look fantastic
Tough decision. For me, the deep purple does have that eggplant tone of aubergine, so if you wear lots of blacks, greys, navys, I'd get this as my more "colorful" accent. The dark grey is lovely for sure, but seems almost flat and one dimensional in pic...like concrete, which would work well in contrast with a less conservative or non-minimalistic wardrobe.
Good call on the wardrobe colours because that describes my two wardrobes

Urban cool - black, grey, white and denim; and casual beach - very mixed and colourful up to and including limes and acid yellow, even a touch of neon, which looks fantastic with a sober dark grey. I asked the store for more advice on the dark grey colour tone because there are so few pictures of it but they weren't overly helpful so I'm guessing it is a concrete or battleship grey.
The purple gets my vote ! Such a wonderful color

It's very hard to find a purple like this ! So dark , saturated and elegant
I've spent the last few days looking at purples and comparing them to the Givenchy colour and I agree, this is an exceptionally nice shade. I don't do red-brown burgundy but eggplant/aubergine or deep purple berry, which this seems to be, is lovely and as you point out, quite rare. And Givenchy calf leather is excellent
Thank you all, I really appreciate the general approval of the purple because it hasn't been featured here much. I actually don't have a single purple bag! That may change soon though ...
