|Wireless network cards for laptops are usually a lot more pricey than their counterparts for PC's. I would suspect that a PCIe NIC for a laptop would be more expensive than a normal PCI card for the same laptop.|
If it were me, I'd do some price comparing between the two and go with the less expensive option.
Truth be told, you won't actually "see" a difference between PCI and PCIE with regard to network speed. A 1000 Mbps PCI card is every bit as fast as 1000 Mbps PCIe card and vice versa.