The Application Process

I'm a senior student and need the recommedation letters for an undergraduate program. I have two ops for the recommender. One of them is a college teacher, he knows me very well but as a person, not as a student or employee. He knows how I face up different situations.
The other was the assistant of my boss, during an internship. He knows how I work, but I think that he can't give many examples about me in the letter as the other one does.

Which one could have more weight in the letter???


Thanks and BR...