Then do. Thats how I treat it. I'm probably never gonna listen to the 24 hour version. Though I do love the fact that it exists.
I don't really know what Kliph played on. He didn't leave the band until 2013 and the 24 hour song was from 2011 so for all I know it could be Kliph. I usually just assume that Drozd plays everything unless stated otherwise though. They've never been too forthcoming with being specific about who plays what.