Should I switch to iPhone 6 or vet Samsung Galaxy S6?

I've been using Android all my life and have come to be spoilt by so many features that iOS lacks. However, every time I do upgrade phones, I always ponder about the possibility of switching to an iPhone.

What I love about the iPhone is how the ecosystem is so well built and free of bugginess. All social media platforms happen to be perfectly optimized for iOS. It's almost like iOS developers treat iPhone users with more attention by perfecting their apps to work best on the iPhone (which is understandable given that there's a 100 billion varied Android devices out there but only one iPhone). I also love the iPhone camera.

The thing I hate about iPhones are it's simplicity. You either do it the iPhone way or don't do it at all. I remember struggling to transfer pictures from an iPhone since I couldn't find a Bluetooth option and only an option to iMessage or send to the iCloud. Seemed like a hassle. I also think Play Store > Apple Store

The Galaxy S6 looks nice but the glass back is putting me off. I can see it cracking. Samsung also has a very buggy OS (I've had to factory reset my previous Samsung device just after 6 months of use). I heard the battery sucks too.

When it comes down to it, I recon I will miss certain apps like Showbox and whatnot on Android but I can give them up for a better experience which Apple could provide.

I ask this because for once the iPhone is cheaper than the Galaxy S6.

Which phone should I upgrade to?