Android vs iPhone

Android phone have the most market share in the low cost smartphone market but virtually no market share in the high end market, the most variety of phones and the most variants of OS as well as the most low profit smartphones on the market but,

Who has the best profit margins?
Which phone is the most secure OS?

iPhone has a user base of 2 Billion mid to high income users globally with an average profit margin of 43% per phone.