The male voice likely comes from somewhere in Central America. I haven't been able to make out where the new female voice comes from, but using the [ʒ] sound (the one in "Asia") for 'll' (and 'y') is typical for the southern half of South America. Here is a short article about the phonetics of those letters.
Ser (with the conjugation es) is used to talk about identity, characteristics, and times and locations of events.
- Él es un buen hombre. - He is a good man.
- La maestra es simpática. - The teacher is nice.
- La reunión es el sábado. - The meeting is on Saturday.
Estar (with the conjugation está) is used to talk about states, conditions, and locations of objects.
- La habitación está sucia. - The room is dirty.
- La niña está triste. - The girl is sad.
- La carta está en el escritorio. - The letter is on the desk.
Estar doesn't only deal with location, but also with state. Ser is used for characteristics and qualities, while estar is used for temporary states.
Él es listo. (He is clever; a quality/characteristic)
Él está listo. (He is ready; a current state)
Él es cansado. (He is tiring; a quality/characteristic)
Él está cansado. (He is tired; a current state)
Él es aburrido. (He is boring; a quality/characteristic)
Él está aburrido. (He is bored; a current state)