I own the naked 1, 2, basic 2, and smokey & the pigmentation and blend-ability of the ud pallets are great.
I also own the maybelline dupes in the original and the blush, and I admit there are certain shades that are pretty much identical to the ud pallets. I think the main differences are the pigmentation & quality/fineness of the glitter shades that are superior in the ud versions.
Also the subtle undertones of the ud shades make what may seem like the same shade on the pallet appear very much different & more sophisticated once applied.
While I think that the drugstore dupes are outstanding for the price, I still would choose the ud pallets if I had to