Following the lashing of blogger Raif Badawi and leaked footage that showed the public execution of a woman accused of beating her daughter, Saudi Arabia's harsh interpretation of sharia law and its use of capital punishment have come under international scrutiny.

For many, the Saudi justice system sounds not unlike that of Isis, the extremist Islamist group also known as Islamic State, which has struck fear in much of the Middle East.

This week, Middle East Eye, a website that focuses on news from the region and is frequently critical of Saudi Arabia, contrasted a set of legal punishments recently announced by Isis with the corresponding punishments in Saudi Arabia.

While Saudi Arabia isn't particularly forthcoming about its use of capital punishment (and Middle East Eye doesn't cite its source) and accurate information from within Isis's self-proclaimed caliphate is hard to ascertain, information from news sources and human rights organisations suggest the chart is at least broadly accurate.

One key difference between Isis and Saudi Arabia, of course, is that the latter is a key US ally in the region – and a member of the US-led coalition fighting Isis. Some experts argue that the fundamentalist brand of Islam practiced by both has theological links, however, and Riyadh's recent crackdown has been interpreted as an act of appeasement for Saudi hard-liners.

In pictures: Raif Badawi release protests Show all 15 1 /15 In pictures: Raif Badawi release protests In pictures: Raif Badawi release protests Raif Badawi release protests People take part in a protest by Amnesty International, for the immediate release of the Saudi blogger Raif Badawi in Helvetiaplatz, Berne, Switzerland In pictures: Raif Badawi release protests Raif Badawi release protests People take part in a protest by Amnesty International, for the immediate release of the Saudi blogger Raif Badawi in London, UK In pictures: Raif Badawi release protests Raif Badawi release protests Ensaf Haider speaks during a protest by Amnesty International, for the immediate release of the Saudi blogger Raif Badawi in Ottawa, Canada In pictures: Raif Badawi release protests Raif Badawi release protests People take part in a protest by Amnesty International, for the immediate release of the Saudi blogger Raif Badawi in Warsaw, Poland In pictures: Raif Badawi release protests Raif Badawi release protests A poster depicting Saudi blogger Raif Badawi, asking for his immediate release, hangs on a gate of a building in Italy In pictures: Raif Badawi release protests Raif Badawi release protests People take part in a protest by Amnesty International, for the immediate release of the Saudi blogger Raif Badawi in Paris, France In pictures: Raif Badawi release protests Raif Badawi release protests People take part in a protest by Amnesty International, for the immediate release of the Saudi blogger Raif Badawi in Brussels, Belgium In pictures: Raif Badawi release protests Raif Badawi release protests People take part in a protest by Amnesty International, for the immediate release of the Saudi blogger Raif Badawi AFP In pictures: Raif Badawi release protests Raif Badawi release protests Ensaf Haidar, centre, wife of the Saudi blogger Raif Badawi, holds a vigil in Montreal, Quebec, urging Saudi Arabia to free her husband Getty In pictures: Raif Badawi release protests Raif Badawi release protests Participant of the Amnesty International protest holds a banner which reads: 'Je suis Raif!' in front of the Saudi Embassy, The Hague, The Netherlands In pictures: Raif Badawi release protests Raif Badawi release protests People take part in a protest by Amnesty International, for the immediate release of the Saudi blogger Raif Badawi, in front of the Saudi Embassy in The Hague In pictures: Raif Badawi release protests Raif Badawi release protests A participant attends the Amnesty International protest demanding the immediate release of Saudi blogger, Raif Badawi, in front of the Saudi Embassy, The Hague, The Netherlands In pictures: Raif Badawi release protests Raif Badawi release protests Amnesty International stages a protest demanding the immediate release of Saudi blogger, Raif Badawi, in front of the Saudi Embassy, The Hague, The Netherlands In pictures: Raif Badawi release protests Raif Badawi release protests Protesters simulate a flogging in front of the Saudi embassy in Washington, during a demonstration against the 10-year prison sentence and 1,000 lashes of Saudi activist Raef Badawi for 'insulting Islam' in a blogpost In pictures: Raif Badawi release protests Raif Badawi release protests Protesters simulate a flogging in front of the Saudi embassy in Washington, during a demonstration against the 10-year prison sentence and 1,000 lashes of Saudi activist Raef Badawi for 'insulting Islam' in a blogpost

Saudi Arabia's own concern about Isis is likely genuine (plans to build an enormous wall along its border with Iraq are a good sign of that), but for many Americans, the extremist group's rise is also bringing with it a renewed skepticism about American allies in the region.