the dark series is going to be stiffer, more stable and faster while the TRS will be a little more flexy and with a little more all-around sort of feel.
Which one is better really depends on what you are looking for. I would pick the DS based on my riding style but I like stiffer, more aggressive boards for all mountain.
Thanks for the input. I am also now looking at the ns legacy. I like the graphic better and warranty but it doesn't have the mange traction. I'm not sure if it is worth it r not to have that? I live on the east coast and will be boarding mostly in NH and VT. Any input on this board at all?