SV Winterslag played 37 league seasons and cup tournaments in the data, 1968 to 1988. Success weighs every finish by how hard that competition was to win; Efficiency is the share of what the club could have won that it did win; Edge compares that with an average participant (×1.00).
| 861 | Cambridge United (England) | 2.2 |
| 862 | Fortitudo Roma (Italy) | 2.2 |
| 863 | AD Alcorcón (Spain) | 2.1 |
| 864 | SV Winterslag (Belgium) | 2.1 |
| 865 | Lech Poznan (POL) | 2.1 |
| 866 | Kuban Krasnodar (Russia) | 2.1 |
| 867 | U.D. (Netherlands) | 2.1 |