How to get coresponding FGLRX number for Catalyst X.Y? (13.4 in particular)

[przemoli]

As in title.

I do not know why distros use flrx 9.someting or 8.something, while AMD use Catalyst 13.something 12.somethin, and then only present fglrx numer in info panel AFTER installation. I just need to install newest driver. But how can I know if distro packaged is newest?