Watch the Get Ready online guitar lesson by Robbie Calvo from The Rhythm Architect
To add interest and separate the frequencies of the guitar parts I chose to build the second guitar voicings on the upper four strings. You'll also see that instead of using exact replicas of the 1st parts chords I've found variations, alternate voicings and even extensions. The Ami11 chord for example adds a nice color to the part and using the Fma7 is really nice too.
Come up with some other variations of your own that work seamlessly with the first guitar part. Remember, you are the architect.