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

In the The Most Criminal Countries rating Saudi Arabia holds position #124 2022 out of 139 and Nigeria is #17 out of 139 2022.
Position of Saudi Arabia is better than position of Nigeria.
Nigeria is leader of the "The Most Criminal Countries" rating. So it is wise to avoid visiting the country or, at least, you need to take additional actions to protect your life and belongings, compared to Saudi Arabia

Referencies:

  1. The Most Criminal Countries 2022 by Numbeo
    The countries in the rating sorted by 'Crime Index' in descending order.
    Nigeria 'Crime Index' value is 64.09
    Saudi Arabia 'Crime Index' value is 24.62