[PaulDavisThe1st]

I agree with the GP on the definition of whataboutism, and think that you have described something with a much older term: "pointing out the hypocrisy".

They both share in common that rather than continuing to talk about just one thing, you are now talking about (at least) two.

But whataboutism is a diversion tactic that tries to shift the attention from behavior/event A to behavior/event B; pointing out the hypocrisy notes the similarities between behaviors/events A and B and contrasts the response.

Both can be deployed in similar situations, but the motivations for choosing one over the other are substantially different.

[Chyzwar]

OP did not state his motivation, leaving it for open interpretation.

[TaurenHunter]

You are responsible for your own interpretation/distortion.