The specs are not identical, you need it lighter and more head light.
People continue to forget that it has gut/poly, string savers, powerpads, and the heaviest overgrip there is. That adds a heck of a lot of weight and I have not come across a K90 that is the weight and balance of Roger's after adding all that to it.
All of the K90s I have seen weigh over 12.70z with 17 synthetic, no overgrip, no string savers, no power pads
If anyone knows where we can get the lighter more head light verson please let me know.