These corners are so close that they're going to have no practical difference when 3D printing them, the maximum deviation between G1 and G3 is only 0.1mm. You need to exaggerate the effect much more to show the difference.

> G3 continuous corners mean that the print head experiences smooth acceleration while printing such corners.

Axial acceleration is the key here, not just acceleration, that however does not matter if the controller does not output feedrate profiles with smooth acceleration to go along with it.

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ricardobeat an hour ago | parent [-]

> the maximum deviation between G1 and G3 is only 0.1mm

In a small 100x100mm box, with a 12mm fillet, G1/G2/G3 corners already have a visible 0.5mm difference. What gives it away is the lack of a hard transition between the flat surface and the corner, that's very noticeable on a reflective surface.

On the mechanical side, I think the effect they refer to also comes down to that transition line - going from a straight line immediately into a curve (G1) which adds lateral forces, vs easing into that curve over a few more steps which avoids jerking the print head.

	▲	LiamPowell 19 minutes ago \| parent [-]
		I may have measured incorrectly in the provided model then. That's still pushing things at 3D printer scales, especially when you don't have a polished surface. I also think an internal corner might be more noticeable by feel.