Vintage purple to green duochrome comparison

Sally Hansen Maximum Growth - Chameleon, Sally Hansen Nail Prisms - Emerald Amethyst, Revlon - Kiwizing & Hard Candy - Groove, all 2 coats

So what's the difference between these four I hear you ask... there isn't one. They're the same frigging polish! Now, several days after doing this comparison, I couldn't tell them apart if I hadn't written down the order I applied them in. ...Well okay, Chameleon is a *tad* more blue than the rest, but basically if you own one there's no need to hunt down any of the others.