None of the above. Same director all the way. As an exception, a final tanda with several different Cumparsitas. Within the tanda: #1: one random song by the said director. Not a great one but easy to recognize, so that everybody knows that now follows a tanda by <said director> #2 and #3: Great hits that everybody will want to dance. #4: one not-so-good song by the said director, danceable for sure but not, well, inspiring, so that everybody will think "Well, enough of <said director>, give us something else now".