Index to pinky are: Orly Gumdrop, Essie Mint Candy Apple, China Glaze Re-Fresh Mint, OPI Hey Get in Lime
Orly Gumdrop - this looks like mint till you get it near other mints, then it looks blue. Check below for a comparison to China Glaze For Audrey, they're very similar.
Essie Mint Candy Apple - the application on this is quite opaque just like Gumdrop, but it's much more green and drastically lighter.
China Glaze Re-fresh Mint - This is about the same depth as the Essie but it's a bit more yellow. This is probably the mintiest of all the mints here.
OPI Hey Get in Lime - this is so sheer, and it's the only jelly-based shade here. It's got the most yellow of all as well. It's my least favorite of all of these. To be honest, I'm not incredibly fond of it.
Thumb = For Audrey, Index = Gumdrop
For Audrey is slightly more blue and glossy but it's SO similar.