Hey @FMalik1, thanks for reaching out! This is a really good question.
Honestly, I would say that building out a separate workflow and separate emails for each list makes the most sense if you need to track list-specific performance. And if the contacts in each list differ enough that they need to live in separate lists, it sounds like you/they would benefit from having group-specific emails that speak to them specifically. Even if you’re just straight up cloning the emails and workflows, you’ll already be able to get much better visibility into individual audience performance.
If you’re not already, I also strongly recommend tracking performance within a HubSpot campaign! If end up creating separate emails and workflows for the list, you can also create a campaign just for them.
Hope this helps!!