The hood differes at the hing area slightly. The fenders sit a bit higher and cover it up. As for longer, no. However you can not mix clip parts the fendors must match the hood and must match the fender supports (I may try swapping the hood). Dakota has it right with the hood height difference.
As I stated, I currently have a 6400 clip on my 3100. Why, because I needed a place to put the clip (the 3100 clip is in the wooden crate bolted where the bed goes) I will most likely keep the wider front clip as I plan on going with wide rear fenders and a custom bed, then I can run steam rollers for tires.
