The EPCC Global Titan finish (which is the same as HOPC's Nautical deck) is actually very different to the Emerald Finish. Although both are printed in China, the Emeral Finish utilises an imported European card stock.
Also, the coating is very different... the Global Titans had something of a drier coating, where as the Emerald Finish uses more of a slick, varnish-like coating.
LPCC describe the Emerald Finish as having flexibility that is somewhere between the feel of the Diamond Finish and the Classic Finish... and I think that is fairly accurate. The card stock is very thin (thinner than even the Legends V1 and the Bee Erdnase 216 deck by CARC), and has really good snap to it.
Like all LPCC and EPCC, it outlasts USPCC decks a few times over.
I like it very much, and for those who haven't tried using the Serpentine deck yet, I highly recommend it -- at the price that Legends are selling it at, with low cost worldwide shipping, you can't go wrong!
http://legendsplayingcards.com/products/serpentine