Purple Tangs and Zoos

[JTrigger]

Anyone with a purple tang have trouble with it chomping on their zoos? Just wondering... and also wondering what people thought when considering purchasing either a yellow or a purple in terms of pros/cons.. I presume both are quite resistant to ich and that as a sole tang they should be fine, but would a purple tend to quarrel more with other fish or is it more aggressive in general?

JT