If you want all the members of your party to be able to access the concierge lounge and services, both studios have to be booked as concierge.
Keep in mind that the concierge rooms are reported to have poor views of the savanna. Also, there are only 5 two bedroom lock off villas available in the concierge booking category. That means a maximum of 5 studios are available on any given night. If someone books a 2 bedroom, that reduces the number of studios and 1 bedroom villas available to be booked.
It is usually difficult to get one studio and very difficult to get 2. Often, the concierge villas are all booked a few minutes after the 11 month booking window opens.