Yes, you can; they will not conflict. Each runs separately. You have to see where you sync your data. In the cloud, you may still see duplicates at this point, but this will be resolved in future updates.
Yes, you can install both Lansweeper On-Prem and IT Discovery on the same server without conflicts, as they operate independently.
However, if you're syncing data to the same cloud site, you may currently notice some duplicate entries. This is something we are actively working on, and future updates will address it.