Viewsonic gtab vs. coby kyros tablet

Joined
Nov 9, 2011
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Anyone have any views on which is better: A 10" viewsonic gtab or a 10" koby kyros?

Also, why does it seem like most tablets running android can't be upgraded in terms of their OS? Why does it seem so hard to upgrade androind 2.x to 3.x?
 
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