From Supreme Commander Wiki
T1 Light Assault Bots are tech 1 direct-fire units designed to perform raiding on lightly defended outposts or assist in direct attacks. They are quick and cheap to build, which makes them an integral component of any commander's T1 force. They are also very quick and agile permitting a limited amount of kiting and allowing them to attack and retreat quicker. It is inadvisable to use them against stationary defenses or commanders as they will be killed in 1 to 3 hits, only providing veterancy. They are also unique in that they are the only units able to fire out of a transport. That technique has been named the Ghetto gunship.
[edit] Factional Differences
the Mech Marine has higher health than others, making it last slightly longer in a firefight against other mobile units.
Little is remarkable about the Flare other than the fact that it uses some sort of sonic weaponry.
[edit] Cybran
The Hunter has slightly lower health than other bots, otherwise little is remarkable.
[edit] Seraphim
The Selen is unique in that it serves the purpose of both light assault bot and land scout. It has lower health and DPS than a conventional assault bot but higher health/DPS than a land scout. It possess radar as well as stealth and cloaking, which makes it more useful for surprise attacks. However, it's stealth and cloaking deactivates when the unit moves or fires, and so move orders must be used with care. It is,however, even cheaper and quicker to build than other light assault bots, which makes it slightly more spammable. A useful trick when using them is to set them to hold fire and place them on a mass spot, which prevents engineers from building on that spot. Note, however, that it's primary purpose is scouting and not attack and is not cost effective to use them when defending against other bots.
A platoon of Cybran Hunters under fire