Statement:
The level of criminal activities is lower in Saudi Arabia than in Monaco

In the The Most Criminal Countries rating Saudi Arabia holds position #124 ²⁰²² out of 139 and Monaco is #123 out of 139 ²⁰²².
Position of Saudi Arabia is better than position of Monaco.
Both countries are outsiders of the "The Most Criminal Countries" rating. So in most cases, you can feel safe and unlikely will face a criminal, compared to most countries of the World.

Referencies:

1. The Most Criminal Countries ²⁰²² by Numbeo

   The countries in the rating sorted by 'Crime Index' in descending order.

   Monaco	'Crime Index' value is	24.92
   Saudi Arabia	'Crime Index' value is	24.62