One is a Wilson, other Yonex. I did the specs with my own (known calibrated correct) so I was able to take their specs out of the equation and work with absolute specs. I think you are on to something with swingweight. Maybe for me, or others too, swingweight plays a more important role in determining what frame will work for each person.
15 year HS tennis coach, trying to find perfect blend between old school and new frames.