no, replication partner (SEPM) has to be on the same version.
cyheck these links
https://www-secure.symantec.com/connect/articles/replication-and-considerations
The Philosophy of SEPM Replication Setup:
http://www.symantec.com/docs/TECH93107
How to add "Replication Partners" and Schedule Replication
http://www.symantec.com/business/support/index?page=content&id=TECH104986
How to perform offline replication between 2 remote sites when normal replication is failing due to bandwidth issues
http://www.symantec.com/docs/TECH95122
About installing and configuring Symantec Endpoint Protection Manager for replication
http://www.symantec.com/docs/HOWTO26797
Installing Symantec Endpoint Protection Manager for replication
http://www.symantec.com/docs/HOWTO26796
Best Practice for setting replication frequency
http://www.symantec.com/docs/TECH91509
Best practices for replication server sizing
http://www.symantec.com/docs/HOWTO53365
Check this video
https://www-secure.symantec.com/connect/videos/replication-concepts-and-configuration