I think they will differ in name, use "rpm -ql xxx | grep bin" when you have installed them.
# rpm -ql gcc | grep bin /usr/bin/c89 /usr/bin/c99 /usr/bin/cc /usr/bin/gcc /usr/bin/gcov /usr/bin/i386-redhat-linux-gcc /usr/bin/protoize /usr/bin/unprotoize
seems i can only see 3.4.4 but i have installed the compat-gcc-32 rpm ?