What is the difference in custom development capabilities between different versions of DJI FlightHub 2?

The different versions of DJI FlightHub 2 have different custom development capabilities - as shown by the table below.

SolutionProfessionalEnterpriseOn-premisesAIO deviceOpenAPI
(this differs between FH2 and FH2 On-prem)Frontend component--FlightHub SyncMQTT Bridge--Algorithms and multimodal LLMSingle Sign-On (SSO)-