| Transition | Count | Queries |
|---|---|---|
| A loses → B wins (improvement) | 3 | URL, Data, Dictionary |
| A wins → B loses (regression) | 0 | — |
| Both win (concordant +) | 27 | — |
| Both lose (concordant −) | 0 | — |
A zero "regression" column with a positive "improvement" column is the clean-win shape.