Flurocoated combines the advantages of fluorine carbon and those of nylon.
XFC in particular has a very high knot strength and unparalleled tensile strength in florocoated.
The plus compared to nylon greater resistance to abrasion, very low visibility in water, less elasticity.
The advantages compared to fluorocarbon are less rigidity, more fluidity in the throw and recovery.
In short, a more resilient, more transparent and less elastic nylon, or a less rigid and more manageable fluorocarbon in the cold months.
In a word XFC fluorine coated for trout area and light spinning.