Cards are far from the same. Some cards will work better than others, but most tend to have similar reception.
Ok so what are the differences Im looking for as far as reception in order to compare one card from another? Also I checked the specks of cards vs usb and they dont seem verry different.
USB adapters have little internal antennas that can barely pick up a signal. PCI card adapters have higher powered external antennas.
I think ill get this model for pci card: EDIMAX EW-7128G