Venus has the most significant volcanic activity among the inner planets, especially in comparison to its adjacent planet- our Earth.

https://en.wikipedia.org/wiki/Volcanism_on_Venus

The notable differences don't end there, as the Equatorial rotational velocity of the Earth is rapid at 1037.5 mph, while Venus has only incidental rotation.

So this is where planetary comparisons begin and lead to the underlying dynamical mechanism for plate tectonics and volcanism on Earth and exclusively volcanism on Venus. Differential rotation across latitudes is almost a given insofar as all rotating
objects with a viscous composition display this feature, including the atmosphere of the gas giants or the Sun's plasma.

An important feature between Venus and Earth is spherical deviation, as Venus is almost a perfect sphere while the Earth has a 26-mile difference between polar and Equatorial diameters.

Of course, all this is impossible to discuss when astronomers insist the Earth doesn't have an Equatorial rotation velocity of 1037.5 mph in accordance with the 24-hour and Lat/Long system because of some irrational allegiance to a misadventure with
timekeeping made centuries ago.

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