I actually keep switching back and forth between my iPhone 5 and Droid Maxx. I've had every iPhone from the original through 5. I've bailed on Android twice in the past (S3 and Note 2). I REALLY want a larger device, and the 4.7-5.0" phones are perfect for me (older eyes...).
The Droid Maxx was my daily driver in Dec, Jan, and part of Feb, and works great for the most part. The one thing I really miss is Messages/iMessage -- most people I know have iPhones, and the seamless switch and message sync between iPhone, iPad, and Mac is great. I've compiled a bit of a list of pluses and minuses at this point, and it's pretty much a toss-up:
iPhone:
++iMessage/Messages/Facetime (Apple's killer feature IMO)
+System Fonts
+Camera (vs Maxx)
++Seamless backup
+iPhoto/photostream (though Dropbox is solid too)
+Hot Links (email, phone numbers, package tracking)
++Security (locked down apps for the most part)
++No Crapware
+Fingerprint lock (Android face unlock is pretty good, tho not super secure)
+Polish (one set of software/hardware)
+OS Update support for years
+Click to top of page
+Address Book Layout
+App Badges (you can hack them in some Android apps)
--ringer/vibrate switch always moving to vibrate at worst times
+Connectivity between messages/camera/etc doesn't require extra apps
+Set custom tones/vibration in address book (Android requires custom message apps)
+App uniformity, choice, finish
Android:
++ Form Factors/Size Choice (big screens are very tough to give up!)
+/- Massive customizability
+Huge Battery (Droid Maxx)
+Active Notifications are great (Moto)
+Notification Center (Still better than iOS)
+Wireless Charging (built in many phones)
+Micro USB (standard and cheap)
+Better Bluetooth integration w my car
+NFC (Payments and camera downloads)
++System keyboard choices (Swype is awesome!)
++Seamless Google integration (my email, contacts, calendars are google)
+Google Now (like it better than Siri generally)
+Gmail App on a large screen
+Speakerphone quality (Maxx)
+Call quality/Signal strength (Maxx)
++Simultaneous call and data on VZW
--Crapware (most can be deleted or hidden)
++Custom launchers (Nova is great!)
+Widgets
+Ringer Volume (Maxx very loud when needed)
Overall, it's a toss-up for me, and I never thought I'd say that. If Android had Apple Messages, that would send me over for good. If the iPhone 6 is larger, I'll probably be happy to stay.
The analogy between OS X and macs vs big box PCs and Windows carries through to phones. Apple's model of building their own hardware and software brings many advantages to Macs and iPhones. The other model brings many hardware choices, customization, various price points, and extra effort to get things just right.
But....it's very clear to me what used to be a huge gap in the overall experience is now essentially a tossup. Hopefully Apple realizes this too and is bringing innovation to this year's hardware and software updates!