Of the two, I prefer Fortitude. Which maps astonishingly well with real life.
According to Webster:
Patience: an ability or willingness to suppress restlessness or annoyance when confronted with delay.
Fortitude: mental and emotional strength in facing difficulty, adversity, danger, or temptation courageously.
Once in a thing, once on a path, execution (regardless of the difficulty) seems overwhelmingly easier than waiting to trigger in the first place.
Difficulty, I can handle. Restlessness gets the better of me, every time.