Licence

Yeah, it should work because they're at the same tier.

When getting a license for an add-on, you have to match the size of your Jira instance. 

For example, if you have Jira for 1000 users, you have to get an add-on license for 1000 users. 

This is Atlassian's rules and we do not have control over them.

I hope you find this useful,

Cheers!