I havnt skiied tms but scratches were sick for me last year in the park. I'm not exactly sure how they compare in the park but the TM will be better on the rest of the mountain.
i had scratchs most of last year and got to tm's at the end of the year. i preferred the tm's, but it is all your preference. if you want a soft ski get the scratchs and if you want a stiff ski get the tm's.