Hmm. I reckon cars will be able to brake later because there are 4 wide tyres but the point that the bike will win is the mid-corner speed. Less weight=less momentum
On a wide race track where cars can bounce ripple strips this point is kinda void. The tight corners and narrow lanes on public roads means bike will be in front.
If you do black spur on a weekend you won't be able to really prove it anyway without losing your licence or hitting a caravan...