I was right, the LRCs are lighter.
HEP1: 113,960 lbs http://division747.ca/wp-content/uploads/HEP1.pdf Page 4
HEP2: 120,000 lbs http://division747.ca/wp-content/uploads/HEP2.pdf Page 2
LRC: 103,087 lbs http://division747.ca/wp-content/uploads/LRC4_Business.pdf Page 10