"Of all life's pleasures, I like nitpicking the best." -- Wally in Dilbert.
In the local authorities that I know, when such people get involved, they then start nit-picking.
This seems quarreling about words seems to be some sort of " theological nit-picking " .
Enough " nit picking ", I shall leave others to make comments on other differences.
If these two do get into a romantic relationship, they may have to curb their tongues when it comes to nit-picking each other.