The difference between these two quoted bombers are minimal.
Kusari Bomber has 400 more armor than the Blood Dragon bomber.
Amount of weapons and bots are exactly the same.
--
Blood Dragon Bomber - Steering: 85500 85500 82500
Kusari Bomber - Steering: 85000 85000 83000
Difference: 500
Again, minimal difference. But I'm not sure that you meant I should compare these two bombers with each other.
Compared to FA and GC bomber: Same firepower that argument of yours is not correct.
True both FA and GC bomber has a bit lower armor.
Bots/Bats difference for all four bombers is +-5 , hardly anything.
Turn rate for the four different bombers is +-1000, don't know if that is significant or not, but dosen't feel like that.
Turrets of FA bomber fires forward, no need to further argument that. Turrets generally are less effective in terms of damage compared to normal guns but usually gets a bonus in speed and range. But in case of the FA bomber who uses the weapon line "Vulture" has exactly the same stats as for guns and turrets:
Quote: Vulture 5
Refire-Rate: 0,33 = 3,03 Shots per second
Power-Usage: 160,00
Projectile-Speed: 600
Needed Hardpoint: hp_gun_special_9
LifeTime: 0,92 = 550 Range
Hull-Damage: 211,20 = 640 per second
Shield-Damage: 105,60 = 320 per second
Quote: Vulture 5 Turret
Refire-Rate: 0,33 = 3,03 Shots per second
Power-Usage: 160,00
Projectile-Speed: 600
Needed Hardpoint: hp_turret_special_5
LifeTime: 0,92 = 550 Range
Hull-Damage: 211,20 = 640 per second
Shield-Damage: 105,60 = 320 per second
--
All ship size issues can't be debated without pictures of the four bombers standing next to each other or something similar to that. Simply stating your opinion that the GC bomber is bigger than say Kusari Bomber is not a valid argument, too subjective.
--
In conclusion: Almost everything except armor versus agility is needed for debate. The remaining issues are not exactly issues, just minimal differences. Also remember that Discovery is about variety and you can't aim to have everything exactly the same. There will always come a point where one party exploits its advantages to fully maximize their success in battle, this is called "adapting to your environment" or in this case, adapting to what toys you are given.