The xfl subs are 3” coils where the sa subs are 2.5” coils. Both are good subs. But I’d go with the xfl. FYI no eBay seller is authorized to sell Ab so be careful. I sell the 12s for $195 each shipped. New with full warranty in the lower states
Ken prolly sent the 2 ohm kids to pull more power from your amp to be louder the components will sound louder because they are closer to your ears But when you hook the components up to the crossovers. You should see a 4 ohm Lias