Please correct me if I am wrong but one node / One vote is not true today and since a long time.
People are not solo-mining BTC anymore through Bitcoin Core
I don't know what we should say now, one ASIC one vote ? One Eh/s one vote ?
It was 1 CPU 1 Vote and you could say that a CPU is representation of computing power or hash power which in turn means someone with a better CPU got "more vote" than someone with a weaker CPU.
This means nothing has changed, you still get a vote equivalent of the amount of computing power you posses. If you have a better ASIC or more number of ASICs you get more votes.