| Spec | Wilson Pro Staff 97 | Wilson Shift 99 Pro |
|---|---|---|
| Weight (unstrung) | 315g | 320g |
| Head Size | 97 sq in | 99 sq in |
| Balance | Head Light | Head Light |
| String Pattern | 16x19 | 16x19 |
| Swingweight | 334 | 343 |
| RA Stiffness | 65 | 72 |
| Strung Weight | 340g | 345g |
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