I don't know. You wait ages for one grey-green-lilac duochrome polish to come along and then three turn up at once.
I thought OPI's Not Like In The Movies was a one-of-a-kind sort of shade, but in the last couple of months I've come across three other polishes that disprove that theory - Revlon's Smoldering (sic), which I picked up in the US in January, Barry M's Silvery Lilac, which came out last month, and lastly Topshop Hypnotic, part of the Sisters of the New Moon summer collection.
All of them have a medium shimmer finish with tiny speck-sized silver microglitter, and all of them shift from purple through silver to green depending on the light.
What I found really interesting though, is that two of the polishes shift in a *different direction* to the others. While Not Like In the Movies is being green, Smoldering is being purple. Same with the Barry M and Topshop shades - somehow they react differently to the light and shift in opposite directions.
Which can only mean...
Reverse-shift duochrome accent nail! I think I've gone to makeup-nerd heaven.
In terms of showdown-ness, I must apologise, because this isn't an especially good post for those looking to snap up a dupe: only one of the polishes is a permanent shade from a UK brand (that's the Barry M). Truthfully, all of them perform well, with OPI perhaps a little more pigmented than the others. But unless you have access to US brands or you're quick enough to catch either the OPI or the Topshop colours before they go, you're stuck with Barry. (No offence, Barry.)
If you fancy doing the reverse duochrome thing, Barry M vs Topshop is the cheapest and most accessible way to go.
OPI Not Like in the Movies is available from a few sites, costing around £10 for 15ml. I just spotted it here for £10.50
Topshop Hypnotic - £6.50 for 8ml
Barry M Silvery Lilac - £2.99 for 10ml
Revlon Smoldering - $4.99 for 15ml (US only - but if you've found this in the UK please do let us know)
Somewhat disturbingly, none of these are PR samples. Disturbing because it means I went out and bought four basically identical polishes using my own ill-gotten money.