The blackberry curve's camera is actually the best that a blackberry phone series has ever had. It has a resolution that is very high, which is 3.2 megapixels. Blackberry bold, on the other hand, has a two-megapixel camera. Apart from the difference between their cameras, almost all other features they have are actually similar. In fact, they look alike.
However, there is a major feature that was present on blackberry bold but absent on the curve. The blackberry curve has GSM and Edge only, and therefore it is limited with respect to data speed if it is not linked to a Wi-Fi network.
While on the other hand, the bold has a band GSM support, 3G, and HSDPA, giving it a max speed of 7.2Mbps. When it is linked to a speedy HSDPA network, the bold could be up to 100 times faster than the curve in data connection.