It's sad how many people get caught up on benchmarks. Benchmarks don't tell the story a phone delivers on a day to day basis. Android will probably never match Apple's ability to optimize it's OS with its Apps.
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Can you please define outdated? Software optimization is a constant issue with Android because all of the manufacturers who have their hands in the pot. Doesn't matter what Android you have, none will compare smoothness of the iPhone.
Outdated as in the 5S SMOKES the S4 with "lesser" hardware. And it's only been 6 months. I'm talking by a few points, I'm talking huge numbers. Plus the app quality is certainly better on iOS.
Personally, I'm finding the app quality not up to par on Android. Alot of apps are downright missing features that iOS has had for a while. And with all the app updates, they still haven't added the features. I'm convinced that alot of these app are simply "ports" and basic features to use the app at that. Twitter STILL doesn't have a tablet version of their app.
My Nike app doesn't have Path integration. My Facebook app doesn't have filters (I like my filters, hush it). Tumblr doesn't allow for uploading multiple photos as a photoset. Flickr doesn't have automatic upload. Snapseed (a Google brand) won't accept S4's photos and resizes them down to 3MP (but it will accept 8MP). Dropbox doesn't allow me to select multiple files and move them. And what's becoming the biggest deal breaker as time goes on without a fix - Instagram flatout doesn't work as it over compresses the photos which look very pixelated. Just to name a few, not including "apps" that are half-assed and supposedly coming soon (1Password, Everpix, Day One, VSCOCam, Mailbox).
Add to that: Google STILL doesn't offer a cloud backup option for the phone the way that iOS has iCloud (pretty much all I use iCloud for).