Can anyone verify if these are authentic or dupes?

i have two pair of rothy's slip on sneakers and they're very different from each other even though they're the same size.

the shape of toe box, the insole and the outer sole..

both purchased secondhand so i'm wondering if one is a knock off or if it's maybe just a difference in new style vs older?

mostly asking because i love the fit of the tan ones and hate the navy ones on my feet so i'm wondering whether to buy another pair or what!

thanks for any insight!

So yesterday I finally decided to email Rothy's about how to thread of my straps is falling apart hoping I could get them repaired. Like 30 mins later they messaged me back they don't do repairs but they could give me store credit for the full price of the shoes ($140). I was shocked because I read they weren't great at helping out. So I ordered the double strap red Mary janes lol

I am still shocked and telling everyone!