Below is a benchmark tests which was performed by PassMark.
http://www.passmark.com/ftp/Endpoint%20Protection%202011%20-%20Performance%20Testing%20-%20Enterprise%20-%20Report%203.pdf#search=%22symantec%22
This document is openly available and compares SEP 12.1 against Trend Office Scan and a number of other products in the market.
VMWare & Symantec announced strategic partnership at VMWorld 2011 to provide desktop as a service (DaaS) using SEP 12.1 and Altiris.
http://www.symantec.com/about/news/release/article.jsp?prid=20110831_02
From a technical perspective SEP 12.1 was selected for it blazing performance in vrtualized environments as SEP 12.1 offers security without comprimise and reduces I/O, CPU & Memory by using intelligent scanning with Insight & SONAR.
The Tolly group has also published a report which compares SEP 12.1 to Trend.
http://www.tolly.com/DocDetail.aspx?DocNumber=211123
Work with your local Symantec SE to cover off the finer details to help you win this opportunity.
