Research In Motion Ltd. released the BlackBerry PlayBook on April 19 in Canada and the US after the tablet was announced in 2010. The PlayBook was the first tablet from the BlackBerry smartphone makers and ran on their native OS (which has since been upgraded to v2.0).

Meanwhile, Japanese tech giant Sony announced the launches of Tablets S and P in August and like BlackBerry they represented the company's debut in the tablet market.

Check out how the two shape up against each other

Sony Tablet S comes in two models, 16GB and 32GB. The BlackBerry PlayBook is available in three models 16GB, 32GB and 64GB.

Dimensions and Weight: Sony's tablet is both larger and heavier than BlackBerry's, measuring 241.2x10.1x174.3mm and weighing approximately 598g; the PlayBook measures 194x130x10mm and weighs 425g.

Display: Sony's Tablet S features a 9.4-inch LED-lit TrueBlack screen with capacitive touch panels. The resolution of the display is 1280x800 pixels. On the other hand, BlackBerry's PlayBook features a 7-inch, WSVGA, muti-touch, capacitive touchscreen with a resolution of 1024x600 pixels.

Processor: The Sony tablet is powered by a 1GHz dual-core Nvidia Tegra 2 processor. The PlayBook is powered by a 1 GHz dual-core processor. Both tablets pack 1GB of RAM.

Operating System: The Sony tablet runs on Android 3.1 (Honeycomb) software, which has reportedly been designed to offer a smooth interface of hardware and software, network entertainment service and cross-device functionality. The PlayBook, meanwhile, runs the BlackBerry software found on its makers smartphones (albeit v2.0). the key features of the upgraded software include built-in email, calendar and contacts; social integration of calendar and contacts and the BlackBerry Bridge service.

Storage: The Sony tablet comes in two models - 16GB and 32GB. The PlayBook offers a third 64GB option.

Connectivity: The Sony tablet offers Bluetooth version 2.1+EDR, IR and Wi-Fi b/g/n. The PlayBook offers Wi-Fi 802.11 a/b/g/n and Bluetooth version 2.1+EDR and has micro USB and HDMI ports.

Camera: The Sony tablet has a five megapixel rear-facing camera and a VGA Face Focus front-facing camera. The PlayBook also has a five megapixel front-facing camera but its rear-facing unit is a higher three megapixel one.

Battery Life: The Sony tablet has a Li-Ion 5000mAh battery which runs for up to 8 hours. The PlayBook runs on a 5300mAh battery.