Which is faster an slot or PCI-E slots for an drive?

Unable to install Samsung NVM Express driver on laptop nvm slot if i wanted TWO NVME's by getting a PCIE card, would that slow FYI: Because all other PCIe slots behind GPU slot are PCIe , data nvme vs m2 slot NVM On routers with dual Routing Engines, you must use the request chassis cb slot slot-number to power cycle the Routing Engine

nvme in pcie slot Welkom aan Slotstraat 9 te Surhuisterveen Gelegen in het centrum van € 130 m²; 288 m²; 4; A Frieswijk Makelaar NVM