OEM 12c Release 3 directories

I have environment profile settings for my paths and I need to update those profiles on my OMS serves for R3 (Linux X86-64).

Are the subdirectories under the Middleware home and gc_inst identical in R3 to subdirectories in 12c Release 1&2? 

For instance, my old profile contains this:

export ORACLE_BASE=/orabase/Middleware

export ORACLE_HOME=/orabase/Middleware/oms

if [ -d /orabase/gc_inst ]; then

export EM_INSTANCE_HOME=/orabase/gc_inst

else

export EM_INSTANCE_HOME=/orabase/Middleware/gc_inst

fi

#-------------------------------------------------------------------------

# Agent Variables

#-------------------------------------------------------------------------

export AGENT_BASE=${ORACLE_BASE}/agent

export AGENT_HOME=${AGENT_BASE}/agent_inst