I had the same dilemma as you . But I decided to buy the Eva In DE first and I love it so much and it fit a lot of thing more than I expected. And I can use it as a clutch for party as well. It's very versatile. Anyway , i still wanna buy a leopard stole later on when the next winter come.
If you are referring to the scarf//stole, rather than the bandeau, that is a tough tough tough decision. I recently tried the scarf in the brown and fell in love immediately. Lays perfectly, looks amazing, matches with everything (its a neutral on its own) and totally gives a new and polished look to an outfit..... Tough decision! I love mine!
Having said that, I recently bought the Eva in DE (and love her) but being that I wanted it just for a clutch/evening bag, I haven't used her yet....
Depends on what you would use more.... Good luck with the decision.