  We have developed two methods for handling $b$ quarks in lattice QCD. One
uses NRQCD (now improved to include radiative corrections) and the other uses
Highly Improved Staggered Quarks (HISQ), extrapolating to the $b$ quark from
lighter masses and using multiple lattice spacings to control discretisation
errors. Comparison of results for the two different methods gives confidence in
estimates of lattice QCD systematic errors, since they are very different in
these two cases. Here we show results for heavyonium hyperfine splittings and
vector current-current correlator moments using HISQ quarks, to add to earlier
results testing the heavy HISQ method with pseudoscalar mesons. We also show
the form factor for $B \rightarrow \pi l \nu$ decay at zero recoil using NRQCD
$b$ quarks and $u/d$ quarks with physical masses. This allows us to test the
soft pion theorem relation ($f_0(q^2_{max})=f_B/f_{\pi}$) accurately and we
find good agreement as $M_{\pi} \rightarrow 0$. }
