I don't think a few short term tests are gonna prove much. You'll get various lag results raiding regardless of the UI. Changing performance settings only invalidates the tests.
To get a reasonable idea what impact a UI is having on your lag, you'll need to use the UI with the same settings for at least a few raids then compair it to another UI with the same settings for at least a few raids. You'll also need to make sure the same windows are open and in roughly the same location for all the testing. Try to control other varialbles that will hurt performance like lots of zoning before the raid starts. If possible, get to the raid zone then reboot befor starting each test.
Also be aware EQ2Maps and Infocenter (bundled with some complete sets) are going to have an additional impact. If not included with one of the UI's you're testing, only fair to remove them from all the test cases. First determin which core UI works best for your system, then try dropping in EQ2Maps and/or Infocenter.
I'd be surprised if other UIs run better than FetishNightfall without EQ2Maps and Infocenter
