Don't Do It!!!!!
Doing a comparo of the Holy Trinity of Motorcycledom would be a fruitless excercise. Any comparo has to have a winner. and the owners of the losing bikes, religious fanatics all, would never accept such an outcome. It would be safer for Sean to discuss abortion issues or the Bush administration's policies than to risk the results of a Holy Trinity comparo.
Imagine armies of the devoted followers of these Paragons of Motorcycle Superiorty (PMSes), torches and farm implements at hand, storming the MO castle and burning Sean at the stake for heresy.
Remember, "A riot is an ugly thing... and before we go killing anyone we'd better make sure that young Frankenstein is not following in his father's footshtops."
Such a test would only inflame the true believers... sort of like the govt's ham-handed attempts to put the Roswell controversy to rest that only stirs up the UFO nuts and creates another flurry of accusations of cover-up.
Sean would have disguise himself by growing a beard, doing his hair in purple spikes, tattooing a Harley logo on his forehead and going into hiding in the Santa Monica Mountains with only a bag of rice and a Swiss Army Knife (sort of like a Japanese soldier hiding in Okinawa after WWII) to avoid dismemberment at the hands of this mob.
Unable to find Sean, these mobs of rioting wrathful motorcycle fanatics would fall upon each other, Keyboards and Logitech mice flailing mightily. Soon the violence would engulf the entire LA basin and the only soultion would be to bring in United Nations Peacekeepers thus ushering in decades of guerilla warfare as these fanatical factions fight it out.
Wouldn't be pretty. So leave the comparo alone, Sean.
The test would be a forgone conclusion anyhow. Everyone already knows that Suzukis are best.