Looks like Fireline crystal re-branded to me. I just read the ratings/diameters for the lines........Nanofil 6lb is .005" and 6lb fireline crystal is .006", not really surprising since 6lb crystal breaks at over 10lbs. Almost seems like Berkeley intentionally they left themselves some room for improvement when they started marketing the previous product!? If only they could finally make a CLEAR superline! Lol! I remember when they tried to market the Crystal as "the only clear superline" Lol! what a load of crap! Berkeley has one hell of a creative marketing department!
Having not seen or fished the line I would be very skeptical that it would be very different at all from Fireline Crystal. That said, Crystal is my go to line on almost all my spinning reels, ice fishing setups and even a few float reels. I will definitely be giving it a try!
I'm also glad to see the 1lb as an option, hopefully it as as thin and limp as the discontinued 1lb Fireline Crystal. That stuff is awesome for tiny baits when icefishing! I bought up about 15 spools of it when I found they were discontinuing it.