D00d, there are some ways in which Buffy could take lessons from Veronica Mars, like seriously intelligent planning and subterfuge. (Although Veronica could take some lessons in ethics and fictive family from Buffy...)

I posit that if you imported Veronica Mars into Angel, she would bust Angel's balls, make hash of Cordelia, fox Wesley completely, amuse Gunn a heck of a lot, and in general destroy the universe.

*runs and hides*