Im really not sure why the Harrier is still being used as the comparison here. There is clear cut evidence of the GR.1 being an intended platform for SRAAM. There are photographs of it alongside the weaponry, documentation by Hawker for the RAF that clearly confirm it and further company information and marketing that shows the clear and direct link. That is more than sufficient. The specific aircraft, we have in game, under its own flag, under its own service.
By comparison, there is no link to Soviet PFMs ever having used, intended to be used or even considered for this weaponry