What to buy?iPhone4 or Samsung Galaxy Tab?

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People have been debating for quite some time and I just wanted hear the different opinions regarding these gadgets. Some say that iphone is a lot easier to use than Galaxy Tab because it's smaller and it's features are more or less like an ipod but some say that Galaxy tab is better because because it's a combination of ipad and iphone which has more efficiency for is it a phone at the same time an entertainment gadget with a bigger screen than iphone..What do i buy guys?