Is CentOS 5.5 Flex the same as Fedora 6 flex ?

Have you seen the package name ?

Find this because I need to update my CentOS 5.5 flex for compiling new wine 1.2....but that is another problem....

For example:
http://mirrors.hpcf.upr.edu/ftp/pub/Mirrors/CentOS/5.5/os/x86_64/CentOS/flex-2.5.4a-41.fc6.x86_64.rpm
http://mirrors.cat.pdx.edu/centos/5.5/os/x86_64/CentOS/flex-2.5.4a-41.fc6.x86_64.rpm

or just maybe a little bug....
Just reporting.