I tasted/have 2 bottles TW unflavored in 36, tried TrueVapors 36 unflavored, and I think Vapor 9, (was rebottled from bulk order...I'll just refer to it as Vapor 9). The Vapor 9 had the least amount of flavor, The TrueVapor tasted slightly sweet, kind of like the same flavor as white granulated sugar, and the TW has a slightly tobacco taste. I use the TW for tobacco flavors, and the Vapor Nine for anything i don't want to change the flavor on. I'm going to order more of TrueVapors unflavored with my next order.