Magnesium aluminum alloy is better, according to the big data show that aluminum magnesium alloy is better than zinc alloy. Magnesium alloy: Advantages: light, hard, cheap workpiece, disadvantages: production technology is not very mature, direct recycling is dangerous, the current number of production machines is small, in addition to die casting is still considered a cheap point, others such as forging parts - expensive; plate parts - expensive. Zinc alloy: Advantages: hard quality, easy to produce, more production machines, remake material production workpiece is cheap (the exception of pure national standard material production pieces), the appearance of the processing technology is pure, disadvantages: the weight is heavy. I hope to help you.