I'm currently signed up for the SPG gold and platinum challenges which started early November. I've already gained gold with 9 stays but now require another 9 stays for Platinum by 31st January. I'm also a gold member with Hilton and taking advantage of the current stacking points offers. Come January I will be working in London for ten nights. What would you do? Take Hilton points or go for SPG platinum and then get Hilton to do a status match to Diamond?