If your idea of usefulness of Ultra is defined by ‘damage after a combo’ then I worry for your Balrog. Ultra 1 is more versatile, useful and, hell, damaging depending on use.
Anti Fireball (Use)
Discouraging Fireball (U1 Ready - How many matches have you watched where someone is playing against a respectable Balrog, and they completely stop throwing fireballs as they expect an U1 that probably never even gets used anyways?)
Anti-Dash OS (Character Specific)
Punish / Combo / Push To Corner
Compare that to Dirty Bull… The fact you can guarantee Ultra 1 half the time is something, even if the damage scaling will be bad in terms of combo - Otherwise it’s used in many ways, some of which result in full grounded damage or even an unscaled juggle (AA), to which U1 is actually good, damage wise. Ultra 1 on Balrog will cause quite a few matchups to change their gameplan - Fireballs become risky, Focus Attacks won’t always fly (Just like how you can SUPER them, Ultra works the same to a degree) etc
Dirty Bull doesn’t have even half that presence as it’s 100% close proximity and easy avoided, making it tough to land and not overly rewarding if it does. Infact I hear the only true use it has is in the Dudley / Balrog matchup as a punish.
Ironically the only reason I never use Dirty Bull (Other than preferring Ultra 1 itself) is because even if I wanted to give it a try, I can’t do the motion on Keyboard
No loss for me anyways.