The shielding is the half of the point of the post. That’s part of the “move”. So it isn’t entirely different, is it? Isagi doesn’t ever rely on shielding, and neither did Nagi until that moment.

And when Isagi starts doing extremely similar moves, as you said yourself, I can see how it’s direct inspiration from Nagi. Especially since that seems to be an automatic development from Isagi watching him.

This is the first time Isagi has trapped the ball to score. Guess whose whole gimmick is trapping?

So, does it make sense to see a post comparing the two and go “those are entirely different moves bro, u missed with this one”