I compared my TP and SP and I must say the SP gives a brighter image.
I didn't find the difference to be as strong as Gabriel describes though
I prefer the SP screen. Don't know if the TP or SP is more natural as I base it on a comparison of a digital pic on my LCD monitor that also has color settings.
So I can only say whether or not its natural compared to the monitor. In this case the SP wins. The Colors are more vibrant. Then again that might be cause my monitor has saturated settings
However, it could be true that the TP gives a more natural image... this is hard to say because to what exactly do you compare it to look natural? printed pics or monitors wont do as these will all differ..