
Its not as easy as that unfortunately! Fluorocarbon has a refractive index (light transmission) close to that of water so in the classic bit of line in a glass of water test it is difficult to see. However I believe Krystonite is copolymer line with a fluorocarbon coating so It will behave slightly differently optically from pure fluorocarbon. Line also gets dirty with fine mud particles and algae.
I'd say that when new fluorocarbon is more difficult to see (but not invisible) than normal line, particularly coloured line like Maxima. As it gets older the advantage starts to disappear. View Krystonite as a premium mono that sinks well and doesn't degrade with UV light and you've about got it.