I use the 10 x 10 all the time and I also use the Uni/Uni but as far as the thinnest knot its definitely the 10 x 10 for me !!!!! I just needed the pictures for the Rigging Party this coming weekend and as always EVERYONE is welcome !!!!!!!!!!!!!!
The 10x10 is MUCH easier to tie if the braid has some time on it, when it is new and stiff I have a heck of a time getting the knot correct. I will chew on the end to soften it up a bit, seems to help. With limp line, it's pretty easy, and I have never had a failure. A snagged lure will break at the lure, generally.
Pat in Joppa