The best I've been able to piece it all together:
CE2/CE3 - There's not much going on here. CE2 is top coil, CE3 is bottom coil. Only hold 1 mil of juice, though some manufacturers offer them in larger capacity. I've never used either, because I've heard the new CE2's aren't very good and I hate using a syringe to fill anything so the CE3 is right out.
CE4 - The eGo clearomizer, often re-branded. The Volt X2 clearo is a CE4, as are the Crystal Vision cartos at NHaler and the I-Turbos at other vendors. And on and on and on... 1.4 ml capacity, more or less. They're not easily rebuildable, if at all. The original ones were press-fit together, but I've heard some manufacterers actually glue the whole thing together now.
CE4+, V2, V3, CE5 - Same design as the CE4, only the heads are replaceable in the same manner as the Vivi Nova. They can be rebuilt the same way, too.
CE5 (6-9) - ??? ...Profit! Mountain Oak Vapor, I think, has what they call a "wickless" CE5. If you're familiar with the Vision Nano, it's very similar on a larger scale. No visible wicks, solid tube with 1 or 2 holes in it with the wick and coil inside.
Keep in mind, most of this is based on observation only. I've only ever used the CE4/CE4+(++) models, and there is a ridiculous amount of vendor and manufacturer confusion when it comes to anything above the CE3. And some even attempt to obfuscate the older CE2/CE3 models.
CE2/CE3 - There's not much going on here. CE2 is top coil, CE3 is bottom coil. Only hold 1 mil of juice, though some manufacturers offer them in larger capacity. I've never used either, because I've heard the new CE2's aren't very good and I hate using a syringe to fill anything so the CE3 is right out.
CE4 - The eGo clearomizer, often re-branded. The Volt X2 clearo is a CE4, as are the Crystal Vision cartos at NHaler and the I-Turbos at other vendors. And on and on and on... 1.4 ml capacity, more or less. They're not easily rebuildable, if at all. The original ones were press-fit together, but I've heard some manufacterers actually glue the whole thing together now.
CE4+, V2, V3, CE5 - Same design as the CE4, only the heads are replaceable in the same manner as the Vivi Nova. They can be rebuilt the same way, too.
CE5 (6-9) - ??? ...Profit! Mountain Oak Vapor, I think, has what they call a "wickless" CE5. If you're familiar with the Vision Nano, it's very similar on a larger scale. No visible wicks, solid tube with 1 or 2 holes in it with the wick and coil inside.
Keep in mind, most of this is based on observation only. I've only ever used the CE4/CE4+(++) models, and there is a ridiculous amount of vendor and manufacturer confusion when it comes to anything above the CE3. And some even attempt to obfuscate the older CE2/CE3 models.
