Well, since you've established that you won't be staying w WP...
I haven't used either iPhone or Android. My WP is my first smartphone. Having said that, if I were contemplating Android vs Apple choices...
Android offers less expensive devices. You could pick up an Android to test drive, and not experience a lot of pain if you like it even less than WP. One exception: It's my understanding that the Amazon Fire is built on the Android open source and thus lacks some of the functionality of Google's hybrid. I've also seen frequent reports of security issues, but you a can research that issue and decide for yourself. Google doesn't seem to be too keen on playing well with Microsoft, but others can provide first hand reports of Android/OneDrive. Be aware that built-ins will likely default to Google Drive.
Apple is spendy, but you know that. Check the specs because things you take for granted, like USB connections, require accessories. Apple may have given in on that issue on newest models. Chargers, headphones, even the stylus, is completely Apple-unique interface. So you'll have to add those costs to the cost of your shiny new iPhone.
Unless your contract has you grandfathered in with a killer data plan, you might even look at going prepaid for a few months while you test drive phones. You won't be locked in to a phone you may not like, and you might even get a schmooze bonus from your carrier if you reenlist.