Which is better - BlackBerry 9900 Dakota comes with a QWERTY candybar design that offers a 2.8-inch touchscreen with a resolution of 640 x 480 pixels, while the BlackBerry Torch 9810 comes with a slider design that offers a QWERTY keyboard and touch screen measuring 3.2 inches with a resolution of 640 x 480 pixels. Both are equipped with Optical trackpad to navigate.
BlackBerry Bold 9900 Dakota offers a thinner body with a lighter weight than the BlackBerry 9810 Torch. BlackBerry Dakota has a size of 115 x 66 x 10.5 mm, weighing 130 grams, while the BlackBerry Torch 9810 has a size of 111 x 62 x 14.6 mm with a weight of 161 grams.
BlackBerry Torch 9810 and BlackBerry Dakota, both have been using the BlackBerry OS 7 operating system with support for the latest 1.2GHz processor and 768MB of RAM. Both also have a capacity of 8GB internal memory and microSD slot support up to 32GB.
BlackBerry Bold 9900 Dakota and BlackBerry Torch 9810 , both equipped with a powerful 5-megapixel main camera with 720p HD video recording capabilities. Unfortunately they are not equipped with a front camera.
For connectivity features, the BlackBerry Bold 9900 and BlackBerry Torch 9810 , both equipped with features such as support for 3G networks with HSDPA and HSUPA, Wi-Fi 802.11 b / g / n, Bluetooth 2.1, microUSB port, and A-GPS.
For power, they are also equipped with a battery that is almost the same capacity. BlackBerry Dakota is equipped with Li-Ion battery capacity 1230 mAh, while the BlackBerry Torch 9810 is equipped with Li-Ion battery with a capacity of 1270mAh.
so all depending on you, BlackBerry 9900 Dakota with a QWERTY candybar or BlackBerry Torch 9810 with a slider.