Fisher - I use both the Tectan Superior (Mono) and Seaguar Invizx and here is my experience.
Until this year, I would have 2 spools with me, one filled with 4# and one with 6# Invizx. And per conditions use one or the other. It saved time with retying, no doubt. But the part that bothered me was Invizx is fluoro(no stretch) and sinks. So it was hard to mend the line and when I would do it, it would spook the fish as it would touch them. Also, while Invizx is the softest fluoro available, it is still a bit a bit coarse when compared to mono.
So this year, I spooled my reel with the Tectan Superior Mono in 6.6# and for tippet 4# or 6# Seaguar Blue Label fluoro. Blue label has the thinness of Invizx. Since Mono floats, mending the line was easier which is what i hoped for, but the best part was how manageable Tectan is. The line is thin, stretches and has no memory. Not sure how much the stretch helped, but I had no issues pulling out some fresh 8#+ chromers and casting super small floats was easier. Also, without memory, not once over the 2 trips this year did I have to deal with a birds nest.
We will see how this goes when the cold sets in, but so far I am very happy with the change.
My 2 cents