I was referring to the CC when I said that analog gear is subject to design choices. So, when someone designs a guitar pedal, the types of filtering that occurs and circuit configuration will be voiced for a guitar. As I’ve said before, even though it is counter intuitive, a Rhodes or Wurly are actually voiced very similar to a guitar and seem to work well with guitar pedals.
A bucket brigade circuit loses frequency content and resolution on each echo. So the longer it goes, the less like the original sound the echo is.