Sorry, my crystal ball is broken.. Don't understand the nature of the question...
First we would need to know the frequency desired. What frequency do you plan to use with the stationmaster, which frequency do you use the Moxon for and why?
The Stationmaster is a commercial antenna...
The Moxon is not much better then a dipole, and if it was for 6 meters, you can put it somewhere else...
The Stationmaster is normally used as a repeater antenna, the Moxon is not.
If the Stationmaster is used for 2 meters and the Moxon for 6, they are two different frequencies, if they were both in the same band, then you may have a problem when transmitting on the Moxon, not to mention the RF getting into the front end of your other receiver - it being turned on or not - would probably damage the front end with overload.
I think instead of posting theoretical questions you need to do some research and find an Elmer to help you. Repeaterbuilder.com would be my first stop. Kevin is Kevin, but he is smart..