I'm wondering why my average mobile position is much better than my average desktop position. I'm wondering if Google is comparing the same queries for both mobile vs desktop or if they're only showing me the top ranked for each type of search.

Is it example 1 or 2?

Example 1: Desktop may have 5,000 ranking queries that average to 21.6
                  Mobile may have 1,500 ranking queries that average to 8.5

OR

Example 2: example.com has 5,000 total ranking keywords, those queries' average ranking in a desktop search 21.6 and mobile search 8.5.

I'm curious to know exactly what I'm seeing in Google's Search Console.