"All three Abrahamic religions" is a bit of a shorthand, bc there are other Abrahamic religions out there but they're much smaller (incl the Druze, Baha'i, Mandaean and Samaritan faiths). "Abrahamic" refers to the fact that they say they worship of the God of Abraham, and claim descent from the Judaism of the ancient Israelites.

no they are all diff.

I understand the "yes" and "no" picks but I'm curious about the "only two of them do" case.

Which religion of the three does NOT worship the same God as the other two?

If I had to pick an odd one out, it'd be Christianity. The conception of God within Islam and Christianity have a lot more in common with each other than they do with Christianity IMO. They believe He has only sent down messengers thus far, and has not begotten a son. Meanwhile the Trinitarian nature of God within Christianity (Father, Son and Holy Spirit) is very much anathema to both Jews and Muslims - it's "associating a partner with God" which is one of the worst sins in both of those religions.

In fact I'd say that Judaism and Islam have more in common with each other than they do with Christianity on a general level.

Technically, yes. At least, according to Islamic POV, it makes sense as both the Jew and Christian religion are derivatives of Islam. According to Islamic discourse, Jews are the people who were the followers of Moses/Musa who was a prophet right before Isha AKA Jesus. They were such a hard-core fan of Moses teaching that they denied any more prophets who came after Moses. Same happened with case of Jesus. By Islam, Mohammad is supposed to be the final prophet. Being the final prophet is important since his teachings will be followed by all the
next generations.