Differences gps here +

Good Morning,
What are the differences between the various GPS packages here?

Here and Here2 are the basic ones running Ublox M8N chip. The latest Here2 has CAN interface.
Here+ and Here+ V2 are the RTK setups. They have Ublox M8P chip.
All the GPS come with well designed 6cm ground plane.

Thanks for the quick reply,
on the proficnc.com website I see these versions, could you explain the difference?
thanks

[HERE+ V2 RTK GNSS (M8P)]
[HERE+ V2 ROVER]
[HERE+ BASE]
[HERE2]

RTK receivers come with ROVER and BASE. The first one is the whole kit(ROVER+BASE), second is only ROVER which goes on copter, third is the BASE which stays on ground to give RTK correction. Last one is the standard M8N GPS with CAN interface.