What is the difference between the Sony cybershot dsc-t90 and t900?

"The most visible difference between the two models is the touch-screen display: the pricier T900 ($379) offers a 3.5-inch LCD with 921,000-dot resolution, the T90 ($299) a more pedestrian 3-inch, 230,000-dot screen. The T900 also supports HDMI output to an HDTV (using the included stand) or a component connection directly from the camera, while T90 HD output is component only." (http://www.digitalcamerainfo.com/content/Six-New-Sony-Cybershots-Include-Touch-Screen-T90-and-T900--10x-Ultra-zoom-H20-19987.htm)

"Another T-series Cyber-Shot dubbed DCS-T90, it's the slimmest Cyber-shot among the group, measures at a mere 15mm, as oppose to its 16.3mm's sibling. There aren't many significant differences between the two except for the smaller 3.0-inch, 230k dot pixels touch-panel, HDMI connectivity and a stereo mic." (http://www.slashgear.com/sony-thin-profile-cybershot-dsc-t90-dsc-t900-with-touch-panel-1734769/)

So, to summarize - nicer (921,000 dots vs 230,000 dots) and bigger (3.5 inch vs 3.0 inch) screen, HDMI output (via included stand which comes in the box of T900 but not with T90),

stereo (vs mono) microphone and a slightly thicker (16.3 mm vs 15 mm) body for T900. And a bigger recommended price - 399 vs 299 USD.