Over the years Sony Ericsson and Blackberry have come along way in how they are developing Mobile Phones.

Over years Sony Ericsson have been the Leaders in the Market with Walkman Phones, now they are going into a different direction with the Satio.

Blackberry Storm 2 has gained popularity in the world of Mobile Phones for its stylish looks and features.

The Sony Ericsson Satio has a 3.5 inch TFT touch screen display with a resolution of 360 X 640 pixels which in turn its display uses up to 16,777,216 million colours. The Blackberry Storm 2 comes with a 3.25 inch TFT Touch Screen and uses only 65,000 colours.
Sony Ericsson Satio has a strong networking power that includes quad band,  GSM (850, 900, 1800, and 1900) and 3G network which allows HSDPA 2100, HSDPA 850/1900/2100. HSCSD, EDGE, GPRS, 3G and WLAN are the connectivity of the phone which is strong enough to provide a very fast internet connection to its users. Transferring data into computer is possible as this instrument holds USB version 2.0 and Bluetooth version 2.0 with A2DP make able to share the data with other tools.

But BlackBerry Storm 2 gained strong connectivity like micro USB, Wi-Fi (Wi-Fi 802.11 b/g as a result user can download data with a high speed and they also can experience a great speed of internet. It also supports GPRS (Class 10 (4+1/3+2 slots), 32 - 48 kbps), EDGE with Class 10, 236.8 kbps.
Satio Offers a Massive 12MP compared to Blackberry Storm 2 3.2MP, Sony Ericsson Satio Camera specs offer far more than Blackberry Storm 2, with the following specs 12* Digital auto Focus, touch focus, Xenon Flash, Video Light, Image Stabilisation, Smile Detection, Red Eye Reduction, GEO tagging,  compare this with the Storm 2 3.2MP, LED Flash which helps to take photos in the dark, the advanced function that the Storm 2 has is GEO Tagging and image stabilisation. It also has a 2X digital Zoom.
Sony Ericsson Satio comes with Standard battery (Li-Po 1000 mAh) which can stand by up to 360 hour for 2G and up to 340 hour for 3G. As a result user can talk non stop up to 11 hour for 2G and up to 4 hour 50 minutes for 3G, when once it is fully charged. I cannot say that I have had this amount of Battery, because I am using the Satio all the time making Calls, testing apps, and transferring to Satio from the PC (whilst it is connected to the PC it is charging, I cannot be without so I am unable to test fully).

On the other hand BlackBerry Storm 2 has a strong battery (Li-Ion 1400 mAh) which provides a talk time up to 5 hour for (2G) and 6 hours for (3G). It also can stand by up to 305 hours for (2G) and 280 hours for (3G).

The Ultimate decision is up to you the User to decide, which is the best Mobile Phone for your needs, to be honest for my needs it has to be the Sony Ericsson Satio, but everyone as their own opinion. All I can do is try to convert you to the Satio.
Conclusion

The Sony Ericsson Satio outstrips the Blackberry Storm 2 by 9 Mega Pixels with the Camera and all the camera features, it also out stripes the screen and screen resolution. A couple of good things for the Blackberry Storm 2 are its looks and the better battery, but I like size and feel of the Satio, it looks good to.