Dearest troll,
I am no chemist but surely the following items should be taken into account:
- the thickness of the teflon layer
- the metal of the pan (a highly conductive metal means a rapid rise in temperature, which could wear off the teflon pretty quickly)
- the treatment used to apply the teflon layer
- any other material used, for example to stick the teflon to the metal (not sure if used).
What has an impact on the cooking is:
- the material of the pan
- the teflon-related issues (i.e. the factors mentioned above)
- the material of the base
- the thickness of the base
- the shape of the pan (cheap pans get deformed pretty quickly)
In Italy, for example
Berndes (German) and
Risolì (Italian) are considered high quality, and they both use teflon, as well as stone. Other famous brand is
Blaumann, but they use stone and ceramic.
I don't know Essen, what I said was simply that
for me it would be hard to recognize a high quality saucepan based simply on the generic description and a picture on ML. I bought a wok here for my SIL, at Jumbo, I can't remember the brand, maybe it was even Tefal... but once I came home and compared it to mine, it looked like a IKEA saucepan.