hehe i was actualy thinking about this this morning so read up on both groups on the final fantasy wiki

even though i like FF8 (marginaly) better than 7 and therfore SeeD(or at least the idea of SeeD) i still voted for SOLDIER as most of the membersof SOLDIER you ever come across would beat up the SeeDs

sure squall and co. are all tough as nails but the rest of them seem to get an asskickin pretty easy as seen during the garden master faction crisis and the battle between the 2 gardens where some seed get killed or KO'd by crappy Galbadian soldiers

one other thing though the theory behind SeeD would suggest they are individualy superior but there are proabably ten times more SOLDIERS are we taking that into account?