Without even giving it too much thought, I would have to say Q-10 is the better hand. With Q-8 you can make a straight to the Queen with just three filler cards. With Q-9, in addition to the straight to the Queen, you can also make a straight to the King, still using just three filler cards. Using just three filler cards, with Q-10 you can make straights to the Queen, King or Ace.
None of you seem to understand. I'm not locked in here with all of you. All of you are locked in here with ME!
Mathematically, QTs is superior to the other hands. It's got a higher kicker and it can make straights in more ways than Q9s or Q8s. Q9 can actually be a dangerous hand if you flop a straight with KJT. If you opponent is showing aggression, they could very well have a better straight with AQ.