Are you a true type-hero?

Came across this thanks to Paul Boag, a really cool quiz for all you typeheads out there, by Derren Wilson:

Once there was a typeface called Helvetica.
It was extremely popular.

Later came a software company called Microsoft.
They borrowed Helvetica for their operating system and called it Arial.

This inferior typeface is now on millions of desktops all over the world.

Can you tell the difference between the original and the rip-off
in these ten examples?