Difference between more like this and more like this field query

Elastic Stack Elasticsearch
1

The query DSL has a couple of queries with its field version, i.e.,

  1. fuzzy like this query and fuzzy like this field query
  2. more like this query and more like this field query

I am interested to know the differences between the two versions. Apart
from the payload, are there any differences in how elasticsearch executes
the query?

Instead of using a field version of the query, can I just use the regular
query api even for single field, like the following? Is the single field
version just syntactic sugar?

{
"query" : {
"more_like_this": {
"fields": ["title"],
"like_text": "foo bar"
}
}
}

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2

You are correct - they both execute the same way (field vs non-field
version). The only difference is a little syntactic convenience of single
field vs multiple fields. As for single field, you can use either method.

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