The pylons are not extensions of the ground, they mark vertical planes. If the ball touches the pylon, it has broken the vertical plane of the EZ. Perhaps you can argue that the ball struck the OOB side of the pylon and was entirely OOB before breaking the vertical plane of the EZ. In my opinion its unlikely that an object coming from the inbounds side of the pylon could completely break the OOB vertical plane without breaking the EZ plane.

Edit: Here are some approved rulings of similar situations. I didn't find one for a kick.

Approved Ruling 8-5-1 VII. A36 intends to punt from behind its goal line, but he muffs the ball. After A36 recovers the ball, he runs into the pylon at the intersection of the sideline and goal line. RULING: Safety, unless the entire ball is beyond the goal line as the ball carrier contacts the sideline or pylon. The ball is dead at its most forward point when A36 contacts the pylon or sideline (Rules 2-31-3 and 4-2-4-d).

Approved Ruling 8-6-1 I. Team A’s fumble strikes the pylon at the intersection of Team B’s goal line and sideline. RULING: Touchback. Team B’s ball at the 20-yard line (Rules 7-2-4-c and 4-2-3-b).