Dear Seng Chee and colleagues,
I am not sure if I understand the question correctly, but I try to answer:
Do you mean with level/step difference a difference in deflection while passing the train?
If yes:
We can calculate the deflection of the embedded rail with our material.
Regarding to the earlier sent spec. we migth rather use Icosit KC 340/45 because for the baseplate they want to have a vertical deflection of