versions 4.0 or 5.0

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I have several Picar-B Mars Rover V4.0s.Is there much difference with version 5.0 ? Before testing, I'd like to know if the Python programs are compatible.
I see there's a remote control in V5.0.Can it be purchased as an option since it wasn't in V4.0 ? Thanks.

1751343084

Great question — I’ve also been curious about the differences between V4.0 and V5.0!
If anyone has tested both, how different are they in terms of hardware and Python compatibility?
And I’d love to know more about the remote too — is it infrared or Bluetooth, and can it be added separately to older models?