Not really. The Saudis are not fans of ISIS. They want to take Assad out, but they also realize that ISIS presents a real threat to the Royal Family, just like AQ is.
AQ represents a threat because they predominately Shia. Saudis operate under sharia law. They’re sunni... they’re safe at least for the time being from ISIS. ISIS is about killing everything not SUNNI... shia, kurds, Christians, and non-sectarian other groups.