  ${\cal KK}$MC-hh is a precision event-generator for Z production and decay in
hadronic collisions, which applies amplitude-level resummation to both initial
and final state photon radiation, including perturbative residuals exact
through ${\cal O}(\alpha^2L)$, together with exact ${\cal O}(\alpha)$ EW matrix
element corrections. We present some comparisons to other programs and results
showing the effect of multi-photon radiation for cuts motivated by a recent
ATLAS W mass analysis. We also show preliminary untuned comparisons of the
electroweak corrections of ${\cal KK}$MC-hh to those of HORACE, which includes
exact ${\cal O}(\alpha)$ corrections with resummed final-state photon
radiation.
