Statement:
The level of criminal activities is lower in Estonia than in South Africa

In the The Most Criminal Countries rating Estonia holds position #126 ²⁰²² out of 139 and South Africa is #4 out of 139 ²⁰²².
Position of Estonia is better than position of South Africa.
South Africa 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 Estonia

Referencies:

1. The Most Criminal Countries ²⁰²² by Numbeo

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

   Estonia	'Crime Index' value is	24.14
   South Africa	'Crime Index' value is	75.37