I prefer the uni which in reality is a hangman's noose and also the locked blood knot.

Very much depends on the size / type ans number of turns as per previous ....
 The place I use a polmar is to tie clip onto the trace end of long lines after the hook has been snelled.. it makes it very easy to get the correct length to clip the traces into the frame.
 In my book for general non top end off shore marlin fishing ids the FG..
Which if follow book instruction becomes very fiddly and long to tie.
With the rod in the holder, bit of brake on the reel....briad tag twisted over the little and next finger so doesnt slip...
And your foot holding the trace line/ spool on the floor.
Both tight.. simply twist the trace in figure 8 s around the braid ....16 20 times.. what ever one prefers
 un wrap the braid from your fingers , quick 1/2 hitch around the tag end of the trace.. pull tight...another to follow around tag and biaid... then a finish knot.
Basically a 2 or 3 thru surgeons tight trim , except around the loop side , not the braid/ trace side.. pull tight trim both tags flush.
Advantage is that when casting there is no trace end to clip the guides .. and a FG is one of the few that is 100%
The other is bimmini twist....which is also excellent for braid to braid cats pawed between the loops.....and swivels / clips catspawed to the end of the briad

Again quick to do using the rod holder.
 loop around couple fingers, plenty of tag end... twist up 24/ 30 times.. hold the tag end down, open your fingers.. the tag twists down over your orginal twists....quick 1/2 hitch either side of the loop, and a finish knot as above around both sides of the loop..
put the loop thru your clip/ swivel.. a d finger in the lop either side and turn the clip thru the lops either side  3 / 4 times .. pull down even.. theres your cat paw
 

I recon Smudge sums it up really well.
not just the type diameter, number turns combined.. but who, brand makes all sorts of differences
 I set up a basic test bench on my old myford lathe bed messed around also.
Then throw in stuff like, hook quality.. how the eye is formed against the shaft..how many ppl actually take note which side of the join they take a snell type knot around ..then blame a the knot or trace.
One just has to do a google.. forget opinions, but where tests have actually been done.. and the differences and conclusions...
Bottom line thu.. lets say we run a 20lb   (or whatever) trace  and thats the 'weakest link'   and lets say someone ties a 80% knot  someone else a 90%  one knot will give at 18lb the other at 16lb... either way both will land 20lb plus snap unless they just cave man winch knowing they dont have 90lb line...

What I did find thu, is be careful where the main line taking the strain is held at 90 deg ... as in a whipping type knot.
Mono / furo etc take a lot of weight, then if backed off a little and brought on the main line up or the loop inside the knot holding it  gets 'cut'.. that tends to happen when one gets close to limits of the gear.

And the reson why I tend to go to more platted type knots like fg bimimi , catspaw concepts
And one very simple knot that really surprises me to this day is the simple 3 times surgeons loop knot.
 Top of a trace.. hooked onto a clip at the bottom of the main line.

I also agree with Smudge - learning to tie a not well seems to make the biggest difference for me. FG is my goto ... I've lost some good fish not `tightening' the knot enough.

palomar is a stronger knot than a uni but not by that much, maybe 10% but you should always tie the knot you are most confident in tying

I doubt anyone can tie a knot that consistently breaks at the same percentage of line weight. Maybe some can but in my experiments I have found a difference between knots and it's hard to judge if a knot is going to be really good or not until you test it. If you can get one within 10% of all the others I think you would be doing exceptionally well.

Uni and palomar both good for terminal tackle, swivels etc. I use the uni as it's one I know and can tie anywhere, anytime regardless of circumstances. FG is my go to for braid to leader. 

Steps: you're right that this thread started with the question about whether uni or palomar but it is legit to suggest alternatives without highjacking the thread.

MightyBoosh wrote: sappercatcha wrote: so me and my brother are both very keen fisherman I love my uni for almost everything back to back from braid to mono single uni for attaching terminal tackle brother uses a Palomar knot he reckons its stronger than a uni and easier and quicker to tie than a uni (which he used to use) I was bored and I sat down and learned the Palomar 1st try its very easy and probably quicker than uni to tie but which is truly the stronger knot? easy to test this for the sake of your argument. you tie a uni knot in one end of a piece of line to something and your brother ties something on the other end with his palomar. you pull for a break. repeat for a best of three. loser buys the beers

I like your work Booshie

If I have a while to tie the knot and I care about it's strength then I use an AG chain knot. Leaves Palomar and Uni (and any other knot where the loaded line is anything but completely straight) for dead.
For general purpose stuff I tend to tie a 6-turn uni, locked blood knot for sinkers cos I can tie one in 5 seconds and who cares if its a bit weak.
Braid to mono, fg all day every day. Though I should probably get a bobbin and learn the PR.