https://www.youtube.com/watch?v=iE3OXADeadw
https://www.youtube.com/watch?v=3I905PXIYww
Mark this is the knot I use (first video with gary) and to me it's perfect...never had an issue with a knot since using this. Like Gary says there are other knots that work....... but the Palomar knot made me hate flouro. I broke off so much I was cussing that line!! I think George or Steven posted to try this knot and that has been the best advice on this line. I'm glad I tried it!!
I think Shaw has an extra loop in his video by looping it on his index finger but I don't do that.
Your right and flouro is a tad larger in diameter but only by a very small amount. The 15# red Label flouro I use is .330mm and the mono from seaguar (Senshi) mono is .300mm so to me its no biggie.
I had always heard that flouro was to stiff and will get crazy with line memory but I haven't found that to be true. I don't use it on spinning reels so that could be an issue?
One thing for sure and like I mentioned the knot is the most important part of using flouro. Until I learned the knot I posted in the reply I would watch it on my iphone while on the lake to get it right and now I can do it fast and perfect.
Man there are so many choices out there and I'm willing to bet like anything each line has its fans. Good luck!