Big difference in site positions between xml and real issue?

Question

Search Engine Optimization

Good day!
The situation is as follows, the positions of the site for commercial requests are the same (xml and real). But the situation with the information component is very different. For example, the main key according to the xml report is in the top 4, and in the real issue it is in the 30th place.
1) Why such a big difference in results?
2) Is it worth waiting for the real output to reach xml based on the results, maybe someone had this in practice?
The first column - Requests, the second - the positions of live issuance, the third - the positions of xml


Ps I always look at the positions through free services on xml and everything coincided.

Answer 1

1) Why such a big difference in results?
2) Is it worth waiting for the real output to reach xml based on the results, maybe someone had this in practice?

Because Yandex decided so and there is no reason to wait for something to change. Just keep this information in mind and that's it.
Back in 2013, Devaka conducted a small study on this issue and came to the conclusion:
For vital queries, search results may vary more, for commercial ones, not so much (6-7%). However, there are single requests that give the maximum difference between positions in XML and in Yandex organic search. The reason for these differences is not yet clear.
In general, if you check through services that use Yandex.XML, you need to take into account a small data error, which may vary depending on the subject.

Answer 2

How do you see real results? What region?