Core numbers are compared in one weight. Some brands only publish them for one weight.
Brunswick U-Motion
|
Hammer NU 2.0
|
Storm Pitch Black
|
Hammer Black Pearl Urethane
|
|
|---|---|---|---|---|
| Brand | Brunswick | Hammer | Storm | Hammer |
| Line | Advanced | Mid | Thunder | Mid |
| Coverstock | Solid Urethane | NU Active | Controll Urethane | Urethane Pearl 78D |
| Cover type | Urethane | — | Urethane | Urethane |
| Core | U-Motion | LED | Capacitor | LED |
| Core type | — | Symmetric | Symmetric | Symmetric |
| RG | 2.596 | 2.586 | 2.560 (16 lb) | 2.650 |
| Diff | 0.020 | 0.027 | 0.023 (16 lb) | 0.015 |
| Int. diff | — | — | — | — |
| Factory finish | 500, 1000 Siaair Micro Pad | 500, 2000 Siaair Micro Pad | 1000 Grit | 500 Siaair Micro Pad |
| Lane condition | — | Light oil – Medium oil | — | Light oil |
| Flare potential | — | — | — | — |
| Reaction | — | Strong arc | — | Smooth arc |
| Color | Deep Dark Purple | Matte Grey | Black | Black Pearl |
| Release date | — | November 20, 2025 | May 27, 2014 | March 21, 2024 |
| Status | Retired | Current | Current | Current |
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