Team or Teamwork

Hi

I've purchase ZexTra Pro + Team Pro licences

I've on my Zimbra server both operationnal Team and TeamWork
I understand that Teamwork it zimlet_zextras_chat and Team is zimlet_zextras_team_classic

Why 2 chats ?
Why one with abilitys and the other with other abilityes ?

Teamwork provide :
- users status
- French language (important for me)
- Video with possibility of mute the others users webcam or microphone
- Chat folder
- ...

Team provide only
- Instant Messenger with other persons (not users of my server)

Zimbra 8.8.15
Team 3.0.9
ZxChat 11.09

Please help me to understant why there is two chats
and witch one shoul I use ?

Thanks a lot