PCI vs USB 2.0 wireless adapter

Is there any difference in perfomance between intenal PCI based adapters vs. external USB based adapters, all other things equal?

The USB ethernet card will be significantly slower then a PCI based card.

[QUOTE=megamaced]
The USB ethernet card will be significantly slower then a PCI based card.
[/QUOTE]

Transfer rates will be good enough, but the fact that it uses a bit of system resources as its USB. 480mbits should be enough for networking though.

USB data must travel over the PCI buss anyway. You might as well just get a PCI card.