In short, catw 01 is the mod nobody played but a very small bunch of guys, modding RTW on limited objectives (improving units graphics) on custom battle only back in... 2007. When the name "classical age" did not even existed. Now retreived, the mod has been completely reworked and completed, using as much elements of catw 05 as possible, including a playable campaign ! It is starting in 264 BC, at the start of the first Punic War. Roster are completely new to all players of CATW mods since they had never publicly released and therefore are totally fresh. There are in addition two new factions, the Galatians and Pergamon. Its 01.3, meaning it's still a beta, but totally playable on Alex, BI and regular RTW, however there will be an update.
CATW 01 battle screens