I think there is an important difference to whataboutism because what the parent mentions is not merely something similar but a reciprocal action.

Say, bringing up alleged violations of human rights in the US in response to mentioning censorship in Russia is whataboutism, but mentioning that not only Russia but both countries try to influence each others elections may signal that two countries are actually having a fair fight (for some definition of fairness) in the information wars as opposed to Russia being the sole aggressor.