I'd probably go for the steel over the alaminium. I found this online:
Remember that old adage ?You get what you pay for?? This is one of those rare cases where it doesn?t apply. There is no substitute for a good carbon steel wok. Not only is it relatively inexpensive, but it conducts heat evenly.. While there many other types of woks on the market today ? aluminum, stainless steel, even copper ? every experienced Asian cook I?ve spoken with still swears by carbon steel, and I have to agree.