I'm also a sysadmin. While we still need to use Windows for certain tasks (and our servers) two of our sites have about 800 iOS devices between them ranging from Apple TVs, iPhones and a lot of iPads. We use DEP for deployment and JAMF Pro to manage our fleet and it's so much simpler than even the Windows devices (which as you'd know are I.T. bread and butter). Software licencing is a cinch as well as pushing apps to certain departments that need them. We can completely administrate the devices remotely and know they're secure because of the enclave.

There's no worries about differing versions of Android (when is the manufacturer going to release the latest version?! Are we secure?!) and servicing is easy because when the devices fall out of warranty every phone repairer will have cheap parts on hand to get devices going again, as opposed to some Android devices where it's cheaper to get a new device than try to repair them.

1:1 Android is more open but Apple is simpler, most of the staff have used iOS devices in the past so for them it's pick it up and off you go, if you've never used Android there can be a learning curve. Also everything Apple will work together, whenever someone needs to present something the built-in Airplay mirroring to an AppleTV is a godsend, no more fussing with 3rd party add-on software (chromecast etc.)