As far as i know, a RAW picture is the camera sensor information "as is".<br>Usually cameras apply some adjustments to RAW picture (brightness, contrast, saturation, white balance, sharpness, etc) to convert those raw bytes into the JPEG preview or JPEG version of your photo.<br>
If you open a RAW picture with software made by the camera's manufacturer, same adjustments are done, so you see the "same" picture when you compare the RAW and the JPEG.<br>Some other softwares handle a little database of raw formats and "default adjustments" for them, trying to obtain the same result, but sometimes they can't and is all left to you :).<br>
It's like analog photography... the negative development can give you a really cool photo or a "washedoutburnedcolorness" one... but the negative is the same!.<br>You could tweak some params in "raw import tool" trying to get the best of one RAW, and then use those settings as default when opening every other raw.<br>
<br>Remember that almost every raw development software gives you slightly different pictures from the same RAW file... some of them with HUGE differences...<br>