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As far as i am aware (someone correct me here if i am wrong) but apple don't actually allow different browsers onto the appstore. Instead they are 're-skins' of Safari. Basically a different look and feel to Safari, so iwould imagine that you will not see any big differences at all and therefore not worth the download.
 
there are different browsers available. The only one I have tried is Arachnid... which is very good. It has a full screen feature which surprisingly makes a pretty big difference when browsing.
 
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