Sky Blue Harp Mine matched exactly except for this month, which was off by the amount of today's transactions. When I reselected All Dates, this month matched. So I wonder if there is something getting stuck in the filter using an exact date until you reset it.
When you are calculating the Delta from the net worth, it should be the same month - previous month. So May 2020 difference should be May 2020 - April 2020. April 2020 would be April 2020 - March 2020.
Superbone I don't know. I mean if you limit it to budget accounts then it'll match the income and expenses report bottom line. If you additionally limit specific categories then it's a graph of just the spending in those categories.