USB v Parallel dongle

[KeesW]

Is there any difference between the performance of the USB and parallel dongles? I've got the latter but might want to change to the USB type because it is easier to take out and plug into other computers.

Are there any advantages and disadvantages that I should know about?

[Anonymous]

The USB sticks out from the computer and appears easy to break to me. The parallel key stays in tight with the screws on either end. The USB is easy to carry around. Pluses and minuses.