NOt sure that indicates anything. If you string the unstrung one or cut out the strung one and compare when they are both in the same state that would be helpful.My racquet's get longer and the stiffness/flex index goes down. I recently strung 1 of my racquets (see my spec's below) and took both (1 strung and the other unstrung) and had them both read on a Babolat RDC. The strung racquet stiffness/flex index had dropped to 68. The unstrung racquet's stiffness/flex index was/is at spec 72 (both same racquets, purchased new at the same time).
Said another way how do you know the unstrung one wouldnt be 68 if it were strung?