WAP-7 is just modified, the plus points is its good weight and its massive pulling effort, which slightly higher than WAP-4 n WAM-4.
Its gene is extracted from WAG-9, whose mammoth pulling effort is almost equally greater to its father WAG-6A/B/C series.
Exceptional given for WAG-9H, which is developed n modified even for better purpose and is almost equally powerful to DLW based GT46MAC WDG-5.