I frequent a lovely nailpolishforum (in Norwegian), and when Metro was released people started wondering how Skyscraper compared to Dorothy who? and OPI's Absolutely Alice. I do not have AA, but I managed to borrow DW from a friend. I also pulled out Midnight mission from my stash, as it also has that whole blue base, silver glitter thing going.
And finally three coats:
MM seems to have a completely different type of glitter, more of a silver foil/shimmer thing. The glitters for DW and S are very similar, but as you can see the bases are very different. Where DW is more of a turqouise/teal colour, S has a more purple tint to it. Also, DW is way more sheer and could easily have benefited from a fourth coat, but there are certain limitations to my patience :-D.
Which one is your favourite? I think I'll personally have to go with Dorothy who?. Now, if I can find a way to not reeturn it ;-)