Aluminium pans are better
Also off topic, but I wonder why you would say that? In my opinion, BIRs tend to use Aluminum pans for a limited number of reasons:
1. First and absolutely foremost, in my opinion, is that they are relatively CHEAP and LIGHT!
2. Aluminium has a relatively high thermal conductivity and thermal difussivity (but it certainly is NOT a "perfect conductor" of heat...should a "perfect conductor of heat actually exist!). This enables it to heat (and cool) quickly and to distribute heat evenly.
3. Aluminium has a relatively low heat capacity (per unit volume) and heats up quickly (maybe important in a restaurant?) and cools down quickly (perhaps easier to control?). But, as a downside, higher heat capacity (per unit volume) materials are better than aluminium regarding heat retention.
4. Aluminium is relatively soft (and reactive), which gives the distinct feeling of scraping away the surface material (which is probably the case) when cooking and stirring.
5. There are many other types of pan (e.g. copper clad, non-stick, carbon steel, cast iron, etc) which can give a better combination of desirable properties i.e. good heat conduction, even heat distribution and high heat capacity. But they tend to be prohibitively expensive (presumably for BIRs!)
That's my view on Aluminium pans, for what it's worth (yes, I do use Aluminium pans; and several other types, including cast iron, copper clad stainless steel, stainless steel, etc)
