[8.10] [DOCS] Adds documentation for data comparison view (#164297) (#164722)

# Backport

This will backport the following commits from `main` to `8.10`:
- [[DOCS] Adds documentation for data comparison view
(#164297)](https://github.com/elastic/kibana/pull/164297)

<!--- Backport version: 8.9.7 -->

### Questions ?
Please refer to the [Backport tool
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Co-authored-by: István Zoltán Szabó <szabosteve@gmail.com>

docs/user/ml/index.asciidoc

@@ -31,6 +31,34 @@ privileges to use {ml-features}. Refer to
 NOTE: There are limitations in {ml-features} that affect {kib}. For more 
 information, refer to {ml-docs}/ml-limitations.html[{ml-cap}].
 
+[discrete]
+[[data-comparison-view]]
+== Data comparison
+
+preview::[]
+
+You can find the data comparison view in **{ml-app}** > *{data-viz}* in {kib}. 
+The data comparison view shows you the differences in each field for two 
+different time ranges in a given {data-source}. The view helps you to visualize 
+the changes in your data over time and enables you to understand its behavior 
+better.
+
+[role="screenshot"]
+image::user/ml/images/ml-data-comparison.png[Data comparison view for {kib} Sample Data Flights ]
+
+Select a {data-source} that you want to analyze, then select a time range for 
+the reference and the comparison data in the appearing histogram chart. You can 
+adjust the time range for both the reference and the comparison data by moving 
+the respective brushes. When you finished setting the time ranges, click 
+*Run analysis*. 
+
+You can decide whether you want to see all the fields in the {data-source} or 
+only the ones that contains drifted data. The analysis results table displays 
+the fields, their types, if drift is detected, the p-value that indicates how 
+significant the detected change is, the reference and comparison distribution, 
+and the comparison chart. You can expand the results for a particular field by 
+clicking the arrow icon at the beginning of the field's row. 
+
 --
 
 [[xpack-ml-anomalies]]
@@ -123,11 +151,11 @@ advanced statistical methods to help you interpret your data and its behavior.
 preview::[]
 
 Log rate analysis is a feature that uses advanced statistical methods to 
-identify reasons for increases or decreases in log rates. It makes it easy to find and 
-investigate causes of unusual spikes or drops by using the analysis workflow view. 
-Examine the histogram chart of the log rates for a given {data-source}, and find 
-the reason behind a particular change possibly in millions of log events across 
-multiple fields and values.
+identify reasons for increases or decreases in log rates. It makes it easy to 
+find and investigate causes of unusual spikes or drops by using the analysis 
+workflow view. Examine the histogram chart of the log rates for a given 
+{data-source}, and find the reason behind a particular change possibly in 
+millions of log events across multiple fields and values.
 
 You can find log rate analysis under **{ml-app}** > **AIOps Labs** where 
 you can select the {data-source} or saved search that you want to analyze.