Well,
Our client wanted to switch from McAfee because:
1) Symantec offerd a better "all the way" solution (including: SEP,SCP,SEE and Vontu DLP)
2) McAfee's device control is a part of McAfee's DLP and the client didnt want to use their DLP.
3) Symantec SEP is one Agent for all anti-virus/firewall/network threat protection plugins. if you know the McAfee solution, you need to install an agent
which has nothing and then deploy AV, after that deploy HIPS (Host IPS) and then deploy DLP (for device control)
4) Symantec is better :)
P.S
I have both STS from symantec on SEP,NAC,DLP and more and McAfee tech specialist for ePO and all of its components. i have implemented them both and i can tell you that symantec is better on most cases. the one thing that McAfee has been better (as of my point of view) is the "Query" ability (on SEP its "reports") which is unbelivebly easy to use and intuative. also with the McAfee agent you can extract more data on each system.
Naor .P.