Hmmm, not ture, I paid $33 US for the I Tamiya kit, and I am paying $29 for the Aoshima one, granted the Aoshima one is the pre order price, its still cheaper .
Right now, at hobby search
Tamyia 86 kits is $40.75
Aoshima 86 kit is $35.66
At hobby link japan
Tamyia 86 kit $40.87
Aoshima 86 kit $ 35.76
I am not seeing how the aoshima kit cost more then the tamyia one
Please note, that these are list price, not the current the reduce prices that both are selling the kits for, but either way, tamyia is still more expensive