Lo siento mucho VS. Mi más sentido pésame
The second one is the formal one right? What are some scenarios where you would use the second one over the first one?
2 Answers
The first can be used in any situation, you stepped on somebody's foot, you pushed him, you spoke to loud..anything really, it means I am sorry.-
The second one can only be used to give your sympathy to a mourning family.
Also,
Mi más sentido pésame = Le acompaño en el sentimiento.