In my case neither. My favorite flex track is Micro Engineering code 55 because of its super-realistic looks. However, I do have some Atlas code 80, which is anything but realistic looking, but I only use it as hidden track. New Atlas code 55 track also looks much better than their older code 55 flex. I use a few Peco turnouts, but not their flex track, so I don't have any experience with Peco flex track.In your opinion...........Atlas or Peco?