Hi. I looked at both and wanted a bag I could wear crossbody to go to say, a park, with my niece. I also wanted a bag I could put inside a bigger bag for travel.
I chose the pochette NM and bought the extra adjustable strap. I love it.
I wanted a square shape and the Eva curves in, so it actually fits slightly less for me because the sides curve in. Plus, I thought the gold are was too flashy and the pochette was more classic.
On the strap, I first bought the non-adjustable strap, but when I got home, it was a tad bit too long. I am 5' 2". I think when wearing a crossbody bag, the length has to hit correctly otherwise it makes a person look dumpy. I see way too many pics with ladies who wear straps that are way too long and it makes them look like they have short legs. So be aware of where your bag hits you.
I love my decision. It works for exactly what I want. I mainly use it as an extra bag when I travel. If needed, I can crossbody it.
I was not looking for a little bag to dress up or wear using the short strap.
Also, I'm not a fan of getting a strap off eBay. In my opinion, it cheapens the bag and makes it look cheesy. Ruins the whole look of wearing designer.
Hope this helps.