If for no other reason than authenticity, I would go with the squared off cup designs that are offered. This contributes to the intended trashy sounds of a Chinese cymbal we have come to love. Historically, that squared off bell, was intended to be a handle of sorts for marching soldiers to hold onto while playing them into battle. The other varieties you show, above, provide a more refined sound, especially the Paiste Novo China. That was designed so drummers, in part, could have access to the Bell, and still play the cymbal right side up. It's all a question of taste, and what sounds you're looking to produce. Also, a lot of modern manufacturers go with a standard round cup, so readily seen on Western style cymbals, because they're easier to produce. Armand Zildjian, stated so in an interview when asked about the making of the China Boy cymbal line, and how difficult it was for them to manufacture a square cup. Isn't it great being a drummer?! Interesting post.