Why do turntables sound different?

I do not know why, but I have heard that it is like this.

Last year I spent a while in a room at the AAA-Forum in Germany
where Conrad Mas from Avid Audio made an interesting test.

There were three of his turntables equipped with the same tonearm-
cartridge combination combined with a 3 input phono stage. The
rest of the sound system was obviously identical.

So many people were in doubt  before the test if there could be more or
less significant differences in the sound of the 3 TTs.
But there were definitively interesting steps going up the ladder in his
turntable portfolio.

@nkonor

If I remember right, he showed the Ingenium, the Volvere and the
Acutus.

Each step brought more "quietness" and "three-dimensionality".

By the way... just next weekend the AAA-Forum-show will again
take place in Krefeld / Germany. So if you want to hear this
demonstration...   ;-)

Yesterday I saw the Avid contest again.

Three turntables (Diva II, Sequel, Acutus) same tonearm (SME IV)
and cartridge (Nagaoka MP-150).

It was astonishing agein to here such really significant differences in
performance.

This weekend Avid was again playing three different turntables.
The sound system was of course constantly the same.

They used the three models Diva, Sequel and Acutus. All were
equipped with SME IV tonearms and Nagaoka MP-150 cartridges.

After that everything was identical.

And again there was a significant difference in soundstage, blackness
and resolution.