Good Point regarding the casual-ness of Oran's and dressier look of the SL's.
I think my girlfriends can't fathom paying more money for a luxury item unless it's Hermes. I'm more of a if it looks good I'll take it regardless if its Gucci, LV, Chanel or even Zara! The SL's were £600 (due to the exotic skin) and the plain leather Oran's are £490 so to my ladies they would rather have Hermes over SL for anything due to their admiration of the Hermes brand. However, I did tell them we are looking at shoes, not handbags so their general rule may not be applicable in this case I guess.
I don’t know this for sure, but I suspect that a fancier version of an Oran is likely pricier than the YSL. Not really comparing apples to apples when comparing exotic skin to plain leather...