  We present a comparison between the voids in two nearly all sky redshift
surveys: the ORS and the IRAS 1.2 Jy. While the galaxies in these surveys are
selected differently and their populations are known to be biased relative to
each other, the two void distributions are similar. We compare the spatial
distribution of the two void populations and demonstrate the correlation
between them. The voids also agree with regard to the overall void statistics
-- a filling factor of ~0.45 of the volume, an average void diameter ~45/h Mpc
and an average galaxy underdensity in the voids of approximately -0.9. Our
measurements of the underdensities of the voids in the two surveys enable us to
estimate the relative bias in the voids between optical and IRAS samples. We
find b(opt) / b(IRAS) ~ 1, showing that on average there is little -- or no --
biasing between the two void populations.
