It hurts my feelings
The gear diff is seriously fine if you use kyosho orings and better shims, BUT I agree you shouldn't have to do that. I also agree that my best tamiya gear diff is still worse than any xray gear diff.
Regardless, I'm looking forward to seeing this car. I'm a bit suspicious of the translation about the suspension components being different, I think it may just be referring to the use of the shorter shocks from the TB04. Time will tell!