Security, Reliability, Usability,
iPhone wins all three hands down.
Lets look at a few bits and which wins...
Cost droid starts at about £70, iPhones start at about 4x that price, Droid.
The ability to limit cellular data use if tight on data plan, Droid
The first and so far best implemented activation lock to prevent theft, Apple.
The easiest to break the activation lock after proving you own and have the phone in question, Apple.
The easiest to use, the phone that 'just works', Apple.
The OS with the fewest viruses and assorted malware in the store, despite Googles attempts to resolve, Apple.
The easiest to apply meaningful MDM without the users being able to circumvent, Apple.
As its a manager involved, brand
Support with iPhone is generally better than with any of the Droids (my experiences with Samsung and Lenovo (Motorola) in particular were... poor)