Would POI be different between a TSS shell (say an Apex) and your run-of-the-mill birdshot, like it would be shooting different rounds through a rifle? Or would you expect the POI to be the generally the same?

I ask because I've got a handful of TSS that I still haven't gotten around to patterning in my new-to-me 20ga....I have a couple each of about 3 or 4 different loads to try out before I buy a box to hunt with. Before I shoot them, I was going to shoot some bird shot to make sure the gun shoots generally where I point it, and have adjustable rifle sights to move POI if necessary....but if I "sight it in" with the bird shot, can I expect the Apex to hit generally the same spot or no?

I just don't want to fire an $8-10 TSS at a poster board and have part of the pattern off the paper....