According to the Christian Greek Scriptures(New Testament), in what way do the beliefs of the Pharisees and Sadducces differ?

Acts 23:8 (King James Version)

"For the Sadducees say that there is no resurrection, neither angel, nor spirit: but the Pharisees confess both."

Confirming verses of the Sadducees' denial of the Resurrection may be found in: Matthew 22:23; Mark 12:18; and Luke 20:27.

Correct Sir, and all four of the references.
The Sadducee's did not believe in the resurrection, that is why they were sad you see