One of these is not like the other...

 Can you spot the odd one out?

Source

 Is any blue just a blue? Not to a nail-aholic like me - see for yourself)))

First up the light (baby) blue - these are 3 coats:

L-R: Essence You Belong To Me, NYC Baby Blue,
FoA Once In A Blue Moon, Maybelline Party Blue

As you can see, they are all very different - no dupes here.

Next I have the medium blue (one coat):

L-R: MaxFactor Candy Blue, Models Prefer Skinny Dip, China Glaze Flyin' High

MP and CG are kind of close, if you can get CG you'd be happy with MP.

These are the blue-green colours (one coat):

L-R: Essence Let's Get Lost , CG Shower Together, Models Prefer Free Style

MP stands out as it is more pigmented, Essence and CG are quite close.

Next, the electric blues (one coat):

L-R: Essence Walk On Air, Misa It's Electric, OPI Dating a Royal

These are all very similar, Misa has a matte finish;
Essence and OPI are pretty much spot on.

And lastly, the bright blues (one coat):

L-R: Portmans Dazzling Blue, FoA Ocen Villa, ulta3 Blue Marlin

Portmans and FOA are close in colour, but the finish is very different. 

ulta3 is in a league of it's own - a clear winner! Very vibrant and glossy!

If you see this elusive beauty - grab it without hesitation for $2 it's a steal)))

Thanks for stopping by and I hope you enjoyed this little comparison!