Not really sure of the alloy used if it is B20 or not. Sound samples can be treated as a reference. Best will be going down to hear the cymbals cos different environment will make the cymbal to sound differently due to room acoustics.
As for hand hammered cymbals, since each cymbal is hand hammered and as human beings, one cannot exactly have the same hammering marks on the cymbal itself, so the sound will differ from cymbal to cymbal a little even they are the same size and in the same series. Eg, 2 Istanbul Mehmet 16" Traditional Paper thin crashes will sound different from each other and u need to hear them being hit side by side. U have to try it for urself to understand. I was quite astonished when I first heard the difference.
As for cymbals set consideration, I will go for the Sabian and Istanbul. Not sure about Turkish Moderate series. I wun go for Zildjian ZHT. Paiste PST 5 is ok. That's my personal preference la, cos everyone hears things different and what u might like might not be mine so go down to hear the cymbals urself will be good
Zildjian - Yamaha
Sabian - Swee Lee
Paiste - Ranking Sports
Istanbul Mehmet - Drums Resources
Turkish - Music Lab
Personally, I will go for individual cymbals instead of box sets. If budget is a concern, save up a little more before buying. For Zildjians, I like the K Customs, Sabians I like HHX and Vault series, Paiste I like Signature, New Signature, 2002 and Twenty series, for Istanbul Mehmets I like the Traditional series, the Sultans are not bad too, for Turkish, I forgot the series but I like the ones my drums instructor Mr Alvin Tan uses in his drum set.