So, in the bottle right next to one another, they look like dupes to me. (Whimsical actually has more glitter, but the colors of the base and glitter are pretty much the same).
I gotta be honest, both formulas were such a pain to apply. They're both runny and I had to dig and dig just to find some glitter. Pictured above is 3 generous coats. Both polishes have a milky blue base with pink and light blue hex glitter and small round silver (?) glitter. I wish the base looked blue like it does in the bottle, but on the nail alone, it just looks... blah.
I didn't want to give up on these polishes just yet, so I layered them on Blue Me Away! by Sally Hansen Xtreme Wear:
A little better, maybe?? Not much. Trying to apply this glitter is like pulling teeth! LOL. Here are 3 coats of both Whimsical and GITA over Blue Me Away! The only difference between these two polishes is...Whimsical is just a bit easier to work with!! (and that's the cheap version)!! Blech, I don't like them. I guess you could layer them over a nude or white, but they'd still be boring in my opinion. So... my advice.. IF you must have one, just buy Whimsical and don't waste your money on this Deborah Lippmann..