That is a meaningless question, akin to "what is north of the North Pole?" (The answer is not "nothing." The question has no answer.)
Neither one is a viable choice. Suck it up and buy a helmet that fits.
Let's say for the sake of argument that you're asking because you want to carry a passenger and don't have a helmet that fits .
No excuse. Why on earth would anyone expose a passenger to increased risk? The response is the same. Buy a helmet that fits before you ride, or don't let the passenger on the bike... no matter how cute she is.
In response to your "which would you rather wear" question, my answer is that I'd rather drive.
Aside from the common-sense aspect of this, you can actually assign a value to it. Last fall I spent five days in the hospital, dealing with a simple leg infection. The hospital billed the insurance company almost $20,000. I had to pay $750 out of pocket.
Pretend for a moment that failure to wear proper gear that fits lands you in the hospital. How does that bill sound to you? Better than making a purchase?
Surely you can afford $75 for a Snell-rated helmet.
http://www.motorcyclegear.com/street...it_helmet.html
