Just a quick post and a sloppy paint job...
Top 2 nails, Nails Inc - Electric Teal
Last 2 nails, H&M - Moody Model
In person you cant tell the difference between the two colours, in the pic though, Electric Teal looks slightly lighter. Nails Inc wins for most even coverage between the 2 but if you love teals and wanted to go for one of these lacquers, I'd say save yourself some pennies and head to H&M. :]