Well my question is about the justification for differentiating between various animals like yo said wild vs. domesticated animals. So does that mean you have tasted both wild and domesticated animals to conclude which one tastes better? Someone may find meat of domesticated pets tasty too? Does this justify killing of pet animals?

You're right when you say it's to do with culture and all cultures had / have things that are illogical and unjustified which we do away once we understand the anomaly. Same is applicable to our culture of consuming animal meat in general.