Blackberry 8900 or Bold?

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Honestly I want to know which one is better.Both have almost the same functions and utilities but the Bold is far more costlier than Curve8900.And I think Curve is more sleek too than the bold.Then what makes Bold costlier.Can anyone used to Blackberry devices help me? I shall Be grateful because for me blackberry is a once in a bluemoon affair so I want to ensure that I am investing for a valued good.