How does microstepping affect stepper motor torque?

Does torque drop in microstepping?
Work in full step or with the maximum division?
We took the Right stepper motor and the Right driver. No China (although we already checked it on it too).
We did some tests and the results are...
00:00 - 02:30 Intro and spoiler
02:31 - 04:06 Full stride, 30 rpm
04:07 - 05:22 1/10 steps, 30 rpm
05:23 - 06:54 1/10 steps, 100 rpm
06:55 - 07:53 Full stride, 100 rpm
07:54 - 10:04 Full stride, 800 rpm
10:05 - 11:03 1/10 steps, 800 rpm
11:04 - 16:47 Analysis of measurement results
16:48 - 19:16 Servo motor VS Stepper motor
19:17 - 23:24 1/10 steps, 100 rpm (servo vs sd)
23:25 - 26:35 Full stride, 100 rpm (servo vs sd)
26:36 - 27:43 Conclusions
27:44 - 28:06 B/W
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