Yes, that’s a good one!

Your solution implicitly defines the curve as the level set of a surface, whereas mine is a parameterized curve. I wanted my heart to have sharp points at the middle and bottom of the heart. This is easier to do with a parametric curve than with an implicitly defined curve.

Contouring algorithms often incorrectly represent the level set of a surface when the surface is tangent to the cutting plane. A classic example is the level set (x-alpha)^2-(y-beta)^2=0, which is supposed to be two lines that intersect at (alpha, beta). Contouring algorithms often represent this level set as two almost-touching hyperbolas.

Notice in your example that the implicit curve as computed by Wolfram Alpha is "rounded" at (0, +/-15/sqrt(17)), whereas a correct representation of the curve would be "pointed" there.