Query_string vs group match in elasticsearch

Question

What is the difference between such a request:

"query": {
"bool": {
 ...
  "should": [
    {
      "match": {
        "description": {
          "query": "test"              
        }
      }
    },
    {
      "match": {
        "address": {
          "query": "test",              
        }
      }
    },
    {
      "match": {
        "country": {
          "query": "test"              
        }
      }
    },
    {
      "match": {
        "city": {
          "query": "test"
        }
      }
    }        
  ]
}}

and that one:

"query": {
"bool": {
 ...      
  "should": [        
    {
      "query_string": {
        "query": "test",
        "fields": [
          "description",
          "address",
          "country",
          "city"              
        ]
      }
    }
  ]
}}

Performance, relevance?

Thanks in advance!

Answer 1

The query is analyzed depending on the field analyzer (if you do not specify the analyzer in the query itself), therefore, querying several fields with one query does not necessarily mean analyzing the query only once.

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Answer 2

, , , match, - .

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