Surgeon's Knot

I often experiment with different color monofilaments while i'm on the water. This is a great knot to quickly change leaders while you're fishing

The surgeon's knot has two fewer rotations than a water knot (rotations which respondent Adolfo adds, and still calls it a "surgeon's")... why does the water knot retain only 60% of breaking strength while the surgeon retains nearly %100?? I'm a new angler and want to understand! Thanks!!

while stronger than a blood knot, I have had even better results by adding one or two more turns in addition to the first two...

excellent