http://en.wikipedia.org/wiki/Nokia_N96#Major_differences_between_N95_and_N96
Major differences between N95 and N96
* 16GB of integrated memory (as opposed to 8GB for N95 8GB), plus further extensibility via microSD memory card
* 2.8 inch display with 16 million colours (same as N95 8GB, versus 2.6" display for original N95)
* Camera flash is a dual-LED in the N96 while it is only a single LED in the N95
* New audio DSP for improved audio quality and longer playback time
* New version of Nokia Video Centre
* Longer music playback time (14 hrs) and video playback time (5 hrs)
* Windows Media WMV9 video codec is added
* Hardware acceleration for video codecs for H.264 and WMV (as well as MPEG4 as before)
* Location tagging (geotagging) of pictures, using the integrated GPS
* Mobile TV DVB-H receiver is built into N96
* New release of Nokia Experience Software
o Maps 2.0 with satellite images, upgrade to pedestrian mode and voice-guided car navigation
o Internet Radio pre-installed
o Home Media Solution (sync with DLNA / UPnP devices over WLAN)
o Online sharing of pictures with plugins for Flickr, Ovi Share and other services (Can be added on N95 with newer version of Share Online Application)
* S60 3rd Edition is upgraded from Feature Pack 1 to Feature Pack 2
o Symbian OS is upgraded from version 9.2 to 9.3
o The Java ME engine is upgraded from MIDP 2.0 to MIDP 2.1
o User data is preserved when upgrading firmware (This feature is also present on the N95-2 as v21 installs UDP base files)
* The FM radio is upgraded with RDS
* Limited graphics acceleration (only for internal apps)
* N96 is a dual-band HSDPA (900 and 2100 MHz) while N95 was a single band (2100)
* MicroSD memory card slot (as in original N95, while N95 8GB has no card slot)
* Same battery as original N95 (950 mAh), but the N96 reportedly has a much better battery life.
* No need to open the slide for optimal GPS reception
* Naviwheel (rocker has touch sensitive mode to scroll through music collection etc)
* New design
o Landscape-oriented design (landscape oriented speakers, connectors and buttons located optimally for landscape use)
o Flip-out kickstand
o Media keys available in all modes (even when slide is closed, for background control of music)
o Media keys on short side can transform into gaming keys
o Lockswitch (enables quick lock / unlock of keypad)
o Thinner and lighter than N95 8GB
* No infra-red port on N96
* CPU downgraded to ARM9 264MHz for N96
* No Hardware 3D graphics accelerator for N96