User blog comment:B214/Question and Answers 6/@comment-185.112.105.215-20170106035554/@comment-29963364-20170106043400

Balance Breakers (BB)

 Regular 


 * A "bug" of the [Sacred Gear System] that came about after the Biblical God's death. It is the "ultimate activation" of a Sacred Gear, in which their abilities can be used to their fullest extent.

 Sub-Species 


 * A BB that is different from the original BB of a Sacred Gear. They can be created accidentally or intentionally, as a result of the user's needs, feelings, and/or desires. The form and abilities of the Sub-Species are, or can be, dependant on the personality & capabilities of the user.

A prime example of this is Sairaorg Bael's Sub-Species BB, [Regulus Namea Leather Rex]. The SG [Regulus Namea] usually takes the form of a Battle-Axe, so the BB of it should take a similar form. But Sairaorg doesn't use weapons, instead fighting with his bare fists. So the SG took a form that suited Sairaorg's personality and fighting style.

 Abyss-Side 


 * A BB that is an "evolution" of an already existing BB. It is achieved by the user training to improve & polish their BB, to the point that they enter the "Abyss" of unknown possibilities. It is basically taking the "bug" that is the Balance Breaker to it's greatest extreme.

 Irregular 


 * A BB that can't be placed in the above mentioned categories. The type this one is closest to is the Sub-Species, but still doesn't qualify to be called such.

The only known cases of an Irregular BB are Yuuto Kiba's [Sword of Betrayer], and Issei's [Illegal Move Triainna] & [Cardinal Crimson Promotion]. These cases were the results of their users combining their Sacred Gears with something completely unrelated to SG's.


 * Light Attribute in Yuuto's case.


 * Evil Pieces in Issei's case.

So to answere your question, A Fandom user...

The Abyss-Side is definitely stronger than the Regular, since the former is an "evolution" of the latter.

The Sub-Species can be stronger, or weaker than the Regular, depending on it's nature and the capabilities of the user who created it.

The Irregular, like the Sub-Species, can be stronger, or weaker than the Regular, depending on it's nature and the user who created it.


 * In Yuuto Kiba's case, we don't know since his Regular BB was never revealed.


 * In Issei Hyoudou's case, since he created the IMT and CCP by using his Evil Pieces to increase the power & capabilities of his Scale Mail, his Irregular BB's are stronger than his Regular BB.