Of course - since the options you mention are labeled "Color by...", only the color changes when you choose different ones
To change the actual isosurface you will have to change the
isovalue.
The three choices you mention mean whether the colormap should apply to the values of [tex]\Psi({\mathbf r})[/tex], the magnitude (i.e. we don't care about the sign, just the value of [tex]|\Psi(\mathbf{r})|[/tex]) or the sign (we don't care about the values, just whether [tex]\Psi(\mathbf{r})>0[/tex] or [tex]\Psi(\mathbf{r})<0[/tex]).
The isosurface itself represents all the points where [tex]\Psi(\mathbf{r})=[/tex] the isovalue, unless you also choose the "Absolute" option in which case you plot the points where [tex]|\Psi(\mathbf{r})|=[/tex] the isovalue.
