I called Vapor DNA and they said the Siren is the v1 Siren, but this batch includes the oil film, or, as we call it here, the diffuser. As you probably know, the v1 Siren came with the diffuser as standard equipment everywhere. For whatever reason, the v1 Sirens that Vapor DNA sold previously did not come with the diffuser. They're selling this batch of Sirens at a lower price point, $26.95, too.
Digiflavor is currently testing a new version of the Siren, that sounds very good, but it is not available for sale at this time. If you go backwards a few pages in this thread, you'll find a post by Xvagabondx that shows photos of the new v2 Siren being tested. Those photos make me think I will like the v2, but it also confirms that it is not the v2 that Vapor DNA is selling right now.
Why are you dissatisfied with your Sirens? Is it the seeping and weeping? If that's the issue, you might want to check out Fad's and 52's anti seep fix. I haven't done it but everyone else who has tried it loves it. It involves tightening the pin under the air tube and installing an o-ring at the base of the air hole or positive post. Sorry, I can't remember which it is, but if you go to page 146 of this thread, you'll find photos and posts that will show you how to stop your Siren from seeping.