cause theirs works better "for them". - in RP, it wouldn t take a genius to attach another 4 turrets on the conference. - as i said, you see 2 more hardpoints - and they could easily attach another two.
but they decided that it was more beneficial for them to allow more cargospace, more armour and a LOT more agility instead of firepower. ( oh - and the twin mines - which some gunboats would love to have i bet )
i mean - you get a quick refire 50.000 shield buster that costs no energy to drop .... thats quite godlike in the most agile gunboat in the game.