[ns] average end-to-end delay in comparison of aodv and aomdv in ns 2.34

hi all,
here i want to say that, i have done the simulation with various pause time and maximum connection for both aodv and aomdv routing protocol in ns 2.34.

i only change aodv to aomdv protocol in the tcl script and the rest code remain same. when i did the comparison of end to end delay seems like aomdv is better than aodv. it is contrast with the theory that actually aodv performs better than aomdv in terms of average end to end delay.

please help me to solve this problem..what is wrong?
thank you very much