Hi @E Davies,
Thank you for an interesting question!
You could create 2 slido events and then handle the different sessions with our multiple rooms feature, but you can also handle everything within one slido event just using the multiple rooms feature. The beauty of it is, that multiple rooms can be used also for sessions running at the same time. So it is up to you which setup you prefer.
As a recommendation from me. In case you have the same group of people attending different sessions from both rooms, I would go for 1 slido event as this would all be handled under the same event code, easy to switch between the sessions. However, if you have 2 separate groups of people and each is attending sessions just from one room, 2 slido events might be better to separate this.
I hope this helps, but please let me know if you have any other questions!
Best,
Lucia