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bug report  The smaller Diode must have a higher average value, but both shown vary 550 +/- 60 mV  roughly.

for example a TO-92 Vbe will average 630 mV

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I wonder what the actual If current used in each meter.

It seems to change.  The parts are random but the diode test current is normally < 1 mA where bulk resistance variations have less affect. I suspect you programmed based on experimental results.

 e.g. 500 uA * 0.1 ohm = 50 uV

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 variation

Bulk resistance affects the result which is inversely proportional to Pd max rating.

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FWIW 

My Rule of Thumb is Rs of any forward diode is Rs= 0.5/Pmax rating  +/-50% Ohms  which I have verified from 10 mA diodes to 100A diodes.

I added + I*Rs  to the AI generated facts

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