The phones come with a unique application which Sony Ericsson calls the Timescape™ which allows users to access:
...all communication together in one place so users can see at a glance text messages, missed calls, and Facebook™ and Twitter updates.
There is also the intuitive 4 corner touch screen user interface, which users can customise to access the most used apps or widgets.
The phones come with a 5 megapixel camera built in and supports HSPA 900/2100 and EDGE 850/900/1800/1900, HSPA 850/1900/2100 and EDGE 850/900/1800/1900.
Both comes with built-in aGPS which you can use with Google Maps and Wayfinder.
The X10 mini pro comes in Black, Red and Pearl White. You get more choice of colours with the X10 mini: Black, Pearl White, Lime, Red, Pink and Silver.
For more info, check out the links below: