just my two cents.
To my knowledge, which goes from going to concerts to going to Ramon Ayala's ranch near Sanger,(oh and aint no bragging, if anyone knew about Ramon Ayala you would know he isn't on some celebraty better than everyone type, I got invited cause I went out with some distant relative of his) but the man is strictly a back up voice. he is the mutha fuckin king of the accordian plus he can take another persons song and make it sound hella good(I didn't say better cause to me that is not posible but his added accordian skills just sometimes make the song different) cause his accordian skills.
Oh and vicente is a legend in his own right, alot a people say that he shouldn't get the recognition he gets cause his most popular songs are remakes but his voice is legendary. And he is one of the only people that can do classics justice. Unlike Lupillo or other fools that try to make a career off of covers.