Do mouthbreathing and poor tounge posture have the same affects?

[Bobbyrino]

If there were two identical twins, and one mouthbreathed their whole life, and the other nasal breathed (with tounge at bottom of the mouth) wouldn't they have the same facial growth patterns? Which one would be more downgrown?

 

[AvidPeptideEnjoyer]

Mouth breathing is the worst habit. EVER, irreversable damage

 

[JAYCELL]

Not even close to being the same

 

[frayed]

not close to the same thing. Mouth breathing is far worse.