Is there really much difference between Bush and Kerry?

[El Barto]

I'd appreciate specific reasoned answers here.

Will who is President really affect the ecomomy much?

Will our defense against terrorism be all that different?

Since Congress will still be divided closely, what laws would pass that don't have bipartisan support anyway?

I know everyone has their preference, but is it going to matter that much to the quality of your life, who happens to be President?

Serious and well-reasoned replies appreciated.