I think Neom is the big difference. They now seem to have accepted that it's an impossible project and started to scale back but even after that it's still a huge investment and one that is needed for them to diversify away from oil. The best way for them to mitigate that is to draw people to live in SA and start investing in it's economy.
Newcastle doesn't do much in that regard but their own league potentially can, so I wouldn't be surprised if they've moved away from any ideas of throwing untold millions at the the geordies and are just going to operate it as almost a normal business, especially given the impact of the financial regulations which make it pretty much impossible for them to 'win'.
I may be wrong and they might start throwing huge amounts of money around but what we're seeing doesn't really support that.