Stronger reducing agent
According to this Wikipedia entry:

&quot;[electronegativity] is a chemical property that describes the
tendency of an atom to attract electrons (or electron density) towards
itself.

then according to an electronegativity scale called the Allen electronegativity:

&quot;...neon has the highest electronegativity of all elements, followed
by fluorine, helium, and oxygen.&quot;

By any scale, oxygen is among the most electronegative elements. More to the point, electronegativity decreases as you go down a period, so  $\ce{Te}$ is much less electronegative, much more able to give up its electrons, than oxygen.  Thus, $\ce{H2Te}$ makes a better reducing agent than $\ce{H2O}$.