I sold my Nikon 24mm f2.0 to be replaced with this f2.8 version. Test reveal
that the optics of the slower f2.8 lens is as good as the
f2.0, is lighter, cheaper, and (possibly) less prone to flare.
I use my 24mm lenses
mainly for wide landscape or architectural shots, usually
on a tripod. With a tripod, there is not an advantage to
being able to go down to f2.0, so I don't miss that extra
stop of light at all.