One difference between Judaism and Christianity is that Christians believe that Jesus is the Messiah whom fulfills the messianic prophecies, while Jews are still waiting for the Messiah.
One similarity between Judaism and Islam is that they believe that Abraham spoke with God.
One similarity between Christianity and Islam is how the angel Gabriel appeared to Mary in their own holy texts.
One difference between all religions is that they have different ideas on who the most impactful leaders were in their faith traditions. For Judaism, Christianity, and Islam, they would be Moses, Jesus, and Muhammad, respectively.
Hope this helps! :)