I've used both operating systems, but I prefer Apple's OS a lot more. I have to admit, though, the Google ecosystem is pretty darn swell and our school encourages us to use features like Google Docs in favor over Microsoft Word or Apple Pages. The customizability of Android was always an interesting feature, but I prefer to feel like a professional when I'm using my devices, and Android apps that are outside of the Google ecosystem tend to have a very unclean look to them. I just cannot stand bad UI design, but I get that it's difficult and time consuming to create visually appealing apps, especially if you're a developer that prioritizes functionality over looks. Then again, I haven't used Android since KitKat, so I'm not sure if Google has set any standards on universal UI design for third party apps yet.