Aftermarket Aluminum Condenser vs OE copper?

[mbboy]

The condenser on my 380sl is leaking, and I have to replace it. So I was wondering whether there's a big difference between the cooling capacity of the OE condenser and the newer aluminum units.

A company near me showed me an aluminum Silla that I can buy for around $100, but it is about 1/2 the thickness and weight of my condenser. However, the guy's telling me that its cooling capacity is as good, if not better than the OE.

Is that true, possible, or wrong?

Thanks in advance for the info.