I'd consider also RG vs YG, with collectors paying more for the first one given its rarity...

If I had 400k usd to spend on this timepiece, I'd probably be not too much worried :-)

Yes, ref. 5091 aka "Sculpture" aka "The Russian Watch". It was produced in LE for the Russian market. Someone like it, someone hate it. It was a gift from a very good friend, therefore I like it :-)