Statement:
The level of criminal activities is lower in Monaco than in Costa Rica

In the The Most Criminal Countries rating Monaco holds position #123 ²⁰²² out of 139 and Costa Rica is #43 out of 139 ²⁰²².
Position of Monaco is better than position of Costa Rica.
Monaco is an outsider of the "The Most Criminal Countries" rating. So in most cases, you can feel safe and unlikely will face a criminal, compared to Costa Rica

Referencies:

1. The Most Criminal Countries ²⁰²² by Numbeo

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

   Costa Rica	'Crime Index' value is	53.86
   Monaco	'Crime Index' value is	24.92