This may be yet another dumb question, but here goes.
The ABT does a series of performances of the same ballet, but change the cast of dancers... perhaps principals, soloists and the corps.
Is is the same ballet, the same sets and costumes and the same choreography, but each performance will have its own personality... I suppose because of the dancers... how they look and dance.
Are the differences in appearance "played up" or played down? Are they meant to be almost identical? Is each performance meant to emphasize the differences that the performers can bring to their roles? Is each cast rehearsed separately or are the rehearsals done "ensemble" with each dancer receiving the same "direction"?
Of course, since ballet dancers at the very minimum will each look different, height, body type, face, skill and so on even with everything else equalized each cast would appear different.
What ARE the variables from performance to performance of the same ballet done by the same company in a series of performances?