Here's we have 2 cymbals. One is a Zilco weighing 3049 grams. The other is a Zildjian weighing 3088 grams. The Zilco is not hammered. The Zildjian is hand hammered. Both are made using the Zildjian proprietary method of formulating the B-20 alloy. Both are the same diameter. The weigh difference between the two is about 1%, so both are virtually identical in weight.
The only real variable between them is that one is hammered and the other isn't. Even the pitches of both cymbals are virtually identical. So as far a s the sound is concerned, this is as pure as possible of a comparison between hammered and non-hammered cymbals with all other variables held constant. Listen and compare. Listen to them both at the same time momentarily switching between them to get a more immediate and accurate comparison. Click on the soundfile link for the 24" Zildjian which is shown in blue lettering within eBay ad.
The Zilco: [ame=http://www.youtube.com/watch?v=YUteXUJZRmI]24" Zilco[/ame]
The Zildjian: 24" Zildjian