Which is better, v blade or KG?

let the opinions fly, looking at cutting a timber logged 8 years ago, like to use D65-15 as I have that tractor. Will it perform? Heavy enough? Read that D7Es and Gs worked well but 8H and K are more weight for better grunt and the D9 is unstoppable. Really not looking to buy a bigger machine if the 65 will perform well enough to shear so many acres a day. Which blade would give better performance at shearing acres?

Which is better, v blade or KG?