Here it is:
Explains everything in a detailed way for us...
RIM's BlackBerry 8300 Lineup : The Boy Genius Report
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8800 (No Camera, GPS)
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8820 (No Camera but WiFi and GPS)
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8300 (Camera, no WiFi, no GPS)
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8320 (Camera, WiFi)
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83xx (Camera, WiFi, GPS)
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9xxx (Don't get me started)