I have the choice of buying the 5k/8k/12k naniwa superstone package from SRD or i can buy a Norton 4k/8k combo and a naniwa 12k localy. Both Sets will cost me the same amount and i usually prefer to buy local, but i was thinking it might be better if i get all 3 stones from the same manufacturer. What should i do

Ps the naniwa 12k that i can buy localy is the 2cm thick stone without a base