Seeking quality advice from a quality messaging board, currently debating whether to pick up the LT 4 or Streak 6 for my new flat. I'm a college athlete with a decently efficient stride and not enough meat on my bones, so I'm not too worried about cushioning since I'll be using these for repeat workouts and maybe a couple road races (5k-10k). Does anyone with experience with both have a preference one way or the other? What're the major differences besides weight and cushioning?