Does Genymotion SaaS use the Genymotion Device Image?

No. Genymotion SaaS uses its own cloud Android virtual devices, not the Genymotion PaaS/Device Image product. The Device Image documentation says those images are for cloud providers, while Genymotion SaaS is a separate solution. I can't find any device templates with Genymotion PaaS/Device image Mobile Testing and Development

If you want, I can also compare Genymotion SaaS, Device Image, and Desktop in one table.