Yes, plenty of us have run tests here...
As to which is better, that depends on your personal situation with respect to what channels you're trying to get. The bow-ties tend to have a wider beam-width, and are easier to aim, but certain commercial versions (I'm looking at you, antennas-direct db4) do not have consistent gain over the full UHF spectrum.
The Gray Hoverman antennas that 300ohm, j3d, and others here have developed are great for, depending on the model, a flat gain curve over the 2009 UHF band, very low SWR, scalability to multiple antenna installations, and even VHFhi reception.
I'm currently working on my first build of j3d's gapless GH10, which seems (to me) a lot easier than the others.
As always, your mileage may vary.