  We present the results from a {\it Hubble Space Telescope/ACS} study of the
supernovae associated with gamma-ray bursts 040924 ($z=0.86$) and 041006
($z=0.71$). We find evidence that both GRBs were associated with a SN
1998bw-like supernova dimmed by $\sim 1.5$ and $\sim 0.3$ magnitudes,
respectively, making GRB 040924 the faintest GRB-associated SN ever detected.
We study the luminosity dispersion in GRB/XRF-associated SNe and compare to
local Type Ibc supernovae from the literature. We find significant overlap
between the two samples, suggesting that GRB/XRF-associated SNe are not
necessarily more luminous nor produce more $^{56}$Ni than local SNe. Based on
the current (limited) datasets, we find that the two samples may share a
similar $^{56}$Ni production mechanism.
