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There are a bunch of Demos of Multi Window on Youtube: https://www.youtube.com/results?client=ubuntu&channel=fs&q=multi+window+demo&oe=utf-8&um=1&ie=UTF-8&sa=N&tab=w1
6 months, 4 weeks ago on T-Mobile Galaxy S III Receiving Update to 4.1.2, Multi-Window In Tow
It does kind of look like the top 13 are a feature-by-feature comparison to me. Those 13 show in Samsung's favor or tied except primarily the weight which is in the iPhone's favor.
1 year, 2 months ago on Samsung Fires First Shot In Galaxy S III, iPhone 5 Smartphone War