I currently have a Genymotion Desktop Account in the test phase, is it easier to delete this account and set up a new one for Genymotion SaaS?

No, you usually do not need to delete your Desktop account to use Genymotion SaaS. Genymotion SaaS accounts are handled separately, and cloud account deletion is a separate process from Desktop trial setup. How to delete my Genymotion SaaS (Cloud) account and all related data? I want to test Genymotion Desktop Pro, with full features, but I have already selected "Personal Use"

If your goal is just to try SaaS, create or use a SaaS account and cancel/delete the cloud account only if you explicitly want to remove it. If your goal is to switch a Desktop trial setup, the documented reset path is to uninstall Desktop, delete the account, then recreate it for the trial flow.