I love the fact that that Passover and Easter, both being lunar holidays, usually overlap. This seems to me to be a sign from God that we're more the same than we are different. To be sure, the official theologies of Passover and Easter are fundamentally different.
The Passover meal is eaten for God, and the Easter meal (the Eucharist) is eaten of God. In Easter, a man becomes God, and in Passover, a man leads an entire people to God at Mount Sinai. In Easter, atonement is made through the sacrificial death and resurrection of Jesus, while in Passover, the ancient biblical sacrifices offered at the Temple in Jerusalem remind us of how we still must sacrifice for our faith and seek atonement from God for our sins.
However, beyond the differences between ham and gefilte fish, chocolate bunnies and horseradish, Exodus from Egypt and Exodus from original sin, there are powerful commonalities between these two supremely important holidays that we'd all do well to remember.