Rahim,
let's say they have 90% of common features.
Then 10% different.
The basic functions like loadbalancing at L3 or L4 are the same.
It's hard to list what is different exactly.
Could you share your CSS config ?
We could look and see if there is anything that would not exist in the CSM.
Also, do you know the ACE module.
This is our latest loadbalancer.
Gilles.