I've just found the specs of the above mentioned racquets: Yonex Vcore Tour 97 - Composition: Elastic Ti/High Modulus Graphite. - Beam: 20 mm. - Head Size: 97 sq. in. . - Length: 68,50 cm. - String Pattern: 16 - 19. - String Tension: 26 - 24 Kp. - Weight (unstrung): 310 g. Yonex Vcore Tour 89 same composition, beam, length, string pattern and tension different - Head Size: 89 sq. in. . - Weight (unstrung): 325 g. My guess is that the 97 version is probably an update of RD TI 80 Lite. Tour 89 Pic: Tour 97 Pic: Now, I "only" have to find Tour 97 for a test, to compare with the Vcore 98 and RD TI 80 Lite that I already own.