Trying to figure out which one both of them seems to be the same to be except one is more fat

http://www.ebay.com/itm/Flexible-USB-3-0-Powered-PCI-E-PCI-Express-1x-to-16x-Risers-50cm-Instock-USA-/111266595631?pt=LH_DefaultDomain_0&hash=item19e801832f

or

http://www.ebay.com/itm/Powered-PCI-Express-PCI-E-1x-to-16x-Riser-USB-3-0-Extender-SATA-Powered-2-feet-/380826471118?pt=LH_DefaultDomain_0&hash=item58ab06cace


can i use these for the x16 slots as well as the x1 slots?