  We study an azimuthally-symmetric boost-invariant quark-gluon plasma using
quasiparticle anisotropic hydrodynamics including the effects of both shear and
bulk viscosities. We compare results obtained using the quasiparticle method
with the standard anisotropic hydrodynamics and viscous hydrodynamics. We
consider the predictions of the three methods for the differential particle
spectra and mean transverse momentum. We find that the three methods agree for
small shear viscosity to entropy density ratio, $\eta/s$, but show differences
at large $\eta/s$. Additionally, we find that the standard anisotropic
hydrodynamics method shows suppressed production at low transverse-momentum
compared to the other two methods, and the bulk-viscous correction can drive
the primordial particle spectra negative at large $p_T$ in viscous
hydrodynamics.
