what is the difference if both are Rockford Fosgate?
Amazon.com : Lightning Audio by Rockford Fosgate Dual 1/0 Gauge Ga Awg Amplifier Installation Wiring Amp Kit : Vehicle Audio Video Power Adapters : Car Electronics
Amazon.com : Rockford Fosgate RFK1D Dual Amp Complete Kit : Vehicle Amplifier Wire And Wiring Kits : Car Electronics
Amazon.com : Lightning Audio by Rockford Fosgate Dual 1/0 Gauge Ga Awg Amplifier Installation Wiring Amp Kit : Vehicle Audio Video Power Adapters : Car Electronics
Amazon.com : Rockford Fosgate RFK1D Dual Amp Complete Kit : Vehicle Amplifier Wire And Wiring Kits : Car Electronics