Orestes plotted with his sister to kill his mother, clytemnestra, and aegisthus. he managed to do so, and the furies tormented him for his crime. the oracle of delphi advised him to exile himself for a year and then come to the temple of athena. after a year, athena convinced some of the furies to stop their torment. the oracle then advised orestes that, to get rid of the other furies, he had to retrieve an image of the goddess from the taurians. he managed to so after meeting his sister in tauria

trying using google im so sorry

i believe the answer is  the similarity is that both are sacrifices which have the same purpose and sacrifice - jesus christ, but the difference is in offering of that sacrifice.

the similarity is that both are sacrifices which have the same purpose (repenting our sins) and sacrifice - jesus christ.  the difference is in the way of the offering that sacrifice. the sacrifice of jesus on the calvary is sacrifice of his actual living body and blood, but the sacrifice of the mass is the sacrifice of the jesus through bread (body) and blood (wine). in the sacrifice on calvary jesus was offered for us; while at mass he offers himself through us.