required OS Patch bundle for RAC 11g R2 for HP-UX Itanium

 Hi,

We want to install Grid Infrastructure 11g R2 (in production environment). When I check the required software on our two nodes, the two nodes show different patch bundle.

node1:/u01/oracle>> /usr/sbin/swlist -l bundle|grep QPK
  QPKAPPS               B.11.31.1003.347a Applications Patches for HP-UX 11i v3, March 2010
  QPKBASE               B.11.31.1003.347a Base Quality Pack Bundle for HP-UX 11i v3, March 2010
 
node2:/home/oracle>> /usr/sbin/swlist -l bundle|grep QPK
  QPKAPPS               B.11.31.0909.341a Applications Patches for HP-UX 11i v3, September 2009
  QPKBASE               B.11.31.0909.341a Base Quality Pack Bundle for HP-UX 11i v3, September 2009

 

The requirement (Oracle® Grid Infrastructure Installation Guide 11g Release 2 (11.2) for HP-UX Itanium E10815-01) is B.11.31.0809.326a Sep 2008. Both of them are higher than the requirment. But I cannot find out a document that requires the two nodes must have the same patch level. Is it okay to install? I am thinking if two nodes have different patch bundle, their linked binary result will not the same. Can I ignore it? Is there any potential impact?