Here is the confirmation that Kalka Shatabdi runs with HOG and not EOG ( or at least, has run on several occasions). This is the annual report from RDSO, and in the first column regarding development of HOG modules for locomotives, it has been mentioned that commercial use of HOG WAP7 had started with Kalka Shatabdi. It is also mentioned here that 2 EOG cars have been modified and that the Loco's HOG module is connected to the feeder cables on the modified power cars.