Statement:
The level of criminal activities is higher in El Salvador than in South Korea

In the The Most Criminal Countries rating El Salvador holds position #9 ²⁰²² out of 139 and South Korea is #118 out of 139 ²⁰²².
Position of El Salvador is worse than position of South Korea.
El Salvador 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 South Korea

Referencies:

1. The Most Criminal Countries ²⁰²² by Numbeo

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

   El Salvador	'Crime Index' value is	67.59
   South Korea	'Crime Index' value is	26.13