Because of the way the JavaScript works I think you'll end up with only one HubSpot Portal receiving information, or worse - neither Portal receiving information.
In short – I would not recommend it.
But, you could run a test and roll-back if it breaks... but it may mess up your data.
Alternately, what if you create 2 teams in one HubSpot Portal and assign different Contacts to different teams?
Because of the way the JavaScript works I think you'll end up with only one HubSpot Portal receiving information, or worse - neither Portal receiving information.
In short – I would not recommend it.
But, you could run a test and roll-back if it breaks... but it may mess up your data.
Alternately, what if you create 2 teams in one HubSpot Portal and assign different Contacts to different teams?