These two cameras are both small and sleek, with both being less than 0.8 inches thick (0.66 for the T900 and 0.76 for the TL225). The Sony is the smaller while shooting, though; the lens of the Samsung telescopes out in use, while the Sony's 4x zoom lens is embedded within the camera body. The Sony also feels like the more robust camera, with a sliding panel that covers the lens completely. The Samsung feels fragile by comparison, with just a thin cover over the front lens element.
The Samsung was the better performer in many of our still imaging tests, with much lower noise in images, especially in low light. The Sony had some better scores in others, though; it had better color and more effective image stabilization. But neither camera was free of problems; both took slightly soft images at both ends of the zoom range.
For video, the Sony was the better performer, shooting video with better color and much more detail. That's not to say that either was all that great, though; both shot video that looked dull and grainy compared to a dedicated camcorder.
In the final analysis, the right pick depends on the features you need. The second screen of the Samsung is very useful if you like to take self-portraits or shots of the kids (with the screen to attract their attention while you shoot), while the Sony is the smaller, sexier camera.
