Around the time I got Chanel Peridot I heard about a possible dupe, Missha HGR01. Here they are side by side.
As you can see, they're not twins. They are more like cousins...the idea is the same, but the colors are different. In the photo below you can see the color shift.
Chanel on the bottom, the Missha on top. You can see that Peridot is predominately green and gold while the Missha is blue and green/gold.
Color shift on the nail.
In the sun it's amazing.
Fortunately I like both versions very much! Some may prefer the Missha over the Chanel, or vice versa, depending on color preference. Application was good with both polishes. The Missha is rose-scented. It is fairly strong, though things like that don't really bother me.
The Missha *is* less expensive than Peridot, but it's shipped from Korea and if you're in the US you'll probably want to order it from eBay. So a little inconvenient if you're into instant gratification. I think that if you already own Peridot, don't rule out the Missha. It's different enough to own both (I know you love to hear that).