External Wireless Adapter Is An External Wireless Adapter Appreciably Slower Than An Internal One (plugged Into A PCI Slot).?

Is an external wireless adapter appreciably slower than an internal one (plugged into a PCI slot).? - external wireless adapter

I have an internship. I stay in a place where my office is dangerously perched high due to extremely weak signal. If I simply to a USB port, would not this problem.

Thank you in advance.