Okay, I made a test map to see how everything turned out:
1) In the overlord with the gattling cannon vs the one with the propaganda tower, the one with the propaganda tower won with a pretty low health.
2) Same setup but with the chain guns upgrade, the one with the propaganda tower won again.
3) Same setup as the first only with subliminal messaging, obviously, the same one won with a lot more health.
4) Same setup as the first only with subliminal messaging & chain guns, the same one won.
5) In the Nuke battle master vs the Tank battle master, it was a tie. They both blew up at the same time. But even though the Nuke battle master is faster, it really isn't that much better because in groups the explosion of one tank affects them all.
6-7) I added some spice to this & made the Nuke & Tank battle masters against the laser tank. The laser Tank won both times.
If you'd like to see these situations yourself, download the map.
Download Attachment: The Map.zip4.2 KB
The second to the top battle, the gattling tank has chain guns, the third doesn't, but the propaganda tank has subliminal messaging & the forth battle, both tanks have both upgrades.