| Sp type | This work | Trundle | McErlean | Crowther |
| B0 Ia | 27.5 | 27.0* | 28.5 | 27.4* |
| B0 Ib | 30.0 | - | - | - |
| B0.2 Ia | 28.5 | - | 28.5 | - |
| B0.5 Ia | 26.0 | 27.3* | 27.5 | 26.0* |
| B0.5 Ib | 27.0 |
- | 26.5* | - |
| B0.7 Ia | 23.5 | - | 24.0 | 22.9 |
| B1 Ia | - | 23.8* | - | 22.0 |
| B1 Iab/Ib | 20.5* | - | 23.3* | 21.8* |
| B1.5 Ia | 19.5 | 21.3* | 21.25 | 18.17 |
| B1.5 Ib | 18.5 | - | 22.3* | - |
| B2 Ia | 18.0 | 19.0 | 19.83 | 18.6* |
| B2 Ib | 18.0 | - | 20.8* | - |
| B2.5 Ia | 17.5 | 16.5 | 18.0 | 16.5 |
| B2.5 Ib | 18.0 | - | 20.5 | - |
| B3 Ia | 16.5 | 14.0 | 17.9* | 15.8* |
| B4 Iab | - | - | 16.5 | - |
| B5 Ia | 15.0 | 14.5* | 15.4* | - |
| B5 Ib/II | 15.0* | - | 15.8* | - |