Yonex EZONE Ai 98 versus Yonex EZONE DR 98 (Stiffness difference?)

[Chopin]

While TW lists the stiffness of these at 63 for the Ai and 62 for the DR, I've checked with two other major tennis retailers and one expressly lists the Ai at 63 and the DR at 59. Another, out west, lists the Ai at 60 and the DR at 62. Anyone know which numbers are more accurate?

 

[mawashi]

I can't tell for sure but with similar strings and tension, the Ai feels softer, it could be the throat is more flexi than the DR but overall I feel the Dr is more crisp and has better feel.

 

[bageldog]

AI is softer on your arm, regardless of what the flex ratings are. I don't think I've ever seen anyone say the DR feels softer. many prefer the DR feel, but its pretty unanimous that AI is softer