Statement:
The level of criminal activities is lower in Qatar than in Oman

In the The Most Criminal Countries rating Qatar holds position #136 ²⁰²² out of 139 and Oman is #133 out of 139 ²⁰²².
Position of Qatar is better than position of Oman.
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.

   Oman	'Crime Index' value is	19.72
   Qatar	'Crime Index' value is	14.15