I'm not sure about an exact / direct comparison but "igetcha69" on youtube will be doing a review of the orion V2 soon I hear. I can't wait to see it. The one big difference between this and the zen is this does not have an insulator tube (ptfe) to aid in preventing the wick to short to the body of the device. I oxidize my wick like crazy but i have had shorting issues a few times. I plan on modding my hole with ptfe to prevent this in the future.