Nostalgia is easily one of the most unique, interesting, creative, and outright magnificent scents i've ever known. As someone very much into cars----it never fails to make me smile. The hints of vintage leather, slight leakage of oil, and luxurious history is one that i've never experienced anywhere else. This scent was created with alot of imagination....for them to capture such a specific place...such a specific feeling----is truly commendable. The opening is GRAND...i love it. The dry down is even better.
Cuir Ottoman is a pretty pure leather scent IMO.....it has some petroleum in it as well, IMO...and it's got sort of a scent that a leather stain would have. it's a little bit chemical and synthetic---but to good effect i think. Very elegant though, and very wearable. I need to get a bottle of this stuff.
I'm not really a fan of Dzing....i don't think it's a good leather scent. It's more like animal skin or fur....kinda nasty.
i've only tried REL once, and wasn't too impressed. there are much better leather scents than this one...
EDIT: oops, i didn't realise til now that the 2 scents i do NOT like are the 2 that you own!! LOL. sorry....just an opinon i guess