It certainly does matter.

In terms of texture and taste, white tuna may very well be indistinguishable from escolar for a lot of people. It's still much less desirable than white tuna. Japan has banned escolar in 1977, deeming it toxic.

Oh, yes. Yes indeed. Escolar is quite tasty - I've had it deliberately - but the gastrointestinal side effects can be very nasty. You don't want to go there when you think you're just eating tuna. This is a very underhanded substitution for a supplier or restaurant to make.

A warm glass of milk and a warm glass of milk with ejaculate in it, can you tell the difference? Does it matter?

Getting an Asian-farmed tilapia instead of a US-farmed catfish would not be good.