I purchased both bags as I think I won't be settled unless I see both in real life. PS1 in black large and Alexa oversized in black plonge leather. The Alexa arrived last week but the plonge leather looks cheap comparing with PS1. It doesn't feel like a $1600 bag at all. I also don't like the fact that if I'm wearing it on the shoulder, the strap will cringe the top of the bag...
I like the fact that Alexa has a longer strap, more feminine and can go with more outfit. However, PS1 won hands down. There is no comparison with leather quality and the chic style. With just $400 difference, I'm going with PS1 and the decision didn't even need a second to make.