Well, hello there, Mo from Montreal! (that's where I moved from!).
Actually, I find that a lot of european products are unusually clever, but you have to look closer.
Given that an engine block is now made of aluminium, why would you want a copper heatercore, which would cause water to eat away at your engine?
Anyways, copper does have better heat conduction properties, but Alu is better for air cooling applications. The ideal solution, for a PC, is a radiator made of copper, with aluminium fins soldered onto it. Copper is best with water, Aluminium is better with air.
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