Guarav - I don't remember because it's been a while since I've compared Litmus to another platform side by side but is it possible it's counting non-unique opens, clicks, etc.? Vs. the Unique opens, clicks, etc. in Eloqua, or are all numbers higher across the board? I would also say that the exact number of opens, etc. isn't as important as the overall percentages by device type, OS type, etc.
Best,
Lauren