I thought it looked familiar, and here's why.
The bottom two are Vivienne Westwood at La Garconne.
Anthropologie didn't bother to alter the design much. Sure, it's a different print, but this is one of Vivienne Westwood's signature tops & she has most certainly done it in plaid.
Speaking of knockoffs, Anthropologie also has a total Alaia wannabe dress in stores. That one is laughable because if you know Alaia, you know that no mass market clothing manufacturer can ever come close to matching his level of design and craftsmanship.
I wonder why Forever21 gets so much flack for copying and Anthropologie doesn't. In any case, I suppose this is good news for all you Vivienne Westwood lovers who don't want to pay dearly for the real thing.