  We compare two frequently discussed competing structures for a stable $\bar b
\bar b u d$ tetraquark with quantum numbers $I(J^P) = 0(1^+)$ by considering a
meson-meson as well as a diquark-antidiquark creation operator. We treat the
heavy antiquarks as static with fixed positions and find diquark-antidiquark
dominance for $\bar b \bar b$ separations $r < 0.2 \, \text{fm}$, while for $r
> 0.5 \, \text{fm}$ the system essentially corresponds to a pair of $B$ mesons.
For the meson-meson to diquark-antidiquark ratio of the tetraquark we obtain
around $58\%/42\%$.
