It is hard to fully specify all the different dimensions of consistency. Look at the code that exists and write in that voice. Maintenance will be much better.

It is even harder to chase personal consistency feelings of multiple different colleagues. Usually inconsistent with each other. Usually enforced only against less assertive committers and not enforced against those perceived to be strong.

That is why you should either make it a rule or let it be.

You should absolutely enforce any patterns that showed up in RCA findings and the results of any R&D that has found better patterns.