There are a few notable differences.
- O'Neill's name changes from O'Neil to O'Neill. O'Neill refers to this when he tells a reporter that there's another Colonel O'Neil with only one L who has no sense of humour (a reference to how differently RDA and Kurt Russell played the parts).
- Other names are different (movie first, TV show second) - Sha'uri/Sha're, Feretti/Ferretti, Sarah O'Neil/Sara O'Neill, Tyler O'Neil/Charlie O'Neill.
- The exact reasons why Daniel was laughed out of the academic community are slightly different. In the film, he simply does not know who built the Pyramids. In the series he directly believed that the Pyramids were landing pads for alien spacecraft - which is correct, they are.
- The film presents Ra as a small grey alien somehow inhabiting the body of a young man. In the series, the Goa'uld (a name not used in the film) are snake-like parasites.
- Abydos is described in the movie as being in a different galaxy to Earth. In the series, it is the closest planet with a Stargate.
- The Stargate appears to have been moved between two different but similar facilities in between movies but this is never referenced. In the movie it is housed in Creek Mountain while it moves to Cheyenne Mountain in the series.
- There are significant differences in the way the Stargate behaves. For instance, in the movie, two fossilised dead Jaffa (a term not used in the movie) are found embedded in the rocks that buried the Stargate. In the TV show, a Stargate that heavily buried would not even activate. When using the Iris, which is just far enough away from the event horizon to allow a connection, any object travelling through the Stargate produces an audible thud but apparently leaves no remains.
Some of the differences in the behaviour of the Stargate itself are generally explained by Carter and the rest of the technical staff having gained a greater understanding of how the Stargate works and adjusting the programming of their self-built dialling computer accordingly. Even then, it is said that Carter's dialling software ignores many of the signals the Stargate sends back that a real DHD would normally act upon.