I purchased three SFP cable that look exactly alike

SFP+ interconnects are designed to support applications for 8 Gbps Fibre Channel and 10 Gbps Gigabit Ethernet. SFP+ interconnects use the same space-per-port as standard SFP cable. SFP interconnects are designed to support for 1.125 Gbps Fibre Channel and 2.5 Gbps Gigabit Ethernet applications. In addition to cages, connectors and cable assemblies, Molex offers loopback adapters, lightpipe cover assemblies and sealed optical assemblies for both 10Gtek SFP cable and SFP.Lightpipes are designed to provide a "link" or "no link" status using LEDs mounted on the PCB. The loopback adapter is a high-performance integrated duplex serial data link for loopback Technologies MAM1Q00A-QSA communications.I have two machines, each with a 10 Gb adapter, directly connected with an SFP cable. I purchased three SFP cables that look exactly alike (physically and specs), but only one works. I'm having trouble finding clear information about SFP cables, so I appreciate the help in understanding the differences.Champion ONE’s SFP+ Twinax/Direct Attach Cables provide an inexpensive, low-power alternative to optical SFP+ transceivers and are a perfect fit for datacenter applications. These SFP cable can be used for simplified intra rack and inter rack configurations. Complete with durable polymer pull tabs to allow for easy removal.