Does it matter that Venus has a lot of extra energy "lying around", so to speak? On Mars everything is very cold, but a floating cloud city on Venus would have

Does it matter that Venus has a lot of extra energy "lying around", so to speak? On Mars everything is very cold, but a floating cloud city on Venus would have some crazy thermal and chemical gradients to tap below it. I can imagine tons of engineering challenges in those conditions, but it seems like the analog of "geothermal" energy on Mars would be less useful than Earth's, and could be considerably more useful on Venus.