There is a fundamental problem in that test, there are only two ropes and the exact configuration of the figure 8 knot can have a large effect. So it is really hard to draw any conclusion.
For a bit more scientific test look at https://www.hownot2.com/post/wet-ropes where the wet rope breaks a bit lower force the dry rope,
The test from Hownot2 was a dynamic climbing rope. The one in the short do look like a rope wit a similar diameter but it might be a static roap that behaves differently, The material in the roap can alos have an effect.
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