iPhone 18Pro 512 GB- Dubai vs India

hello, want to buy the 512 GB iphone 18 pro and am travelling to dubai soon. I have the Regalia Gold which does not have a very high forex markup so was thinking of swiping it there and also enabling GVP before going. Can anyone advice if that could be a good idea? Can use it in the Apple Store but they won't give a VAT refund. But the points could be helpful I reckon for 5k+ AED? I hear resellers like Sharaf DG charge 1K AED more. In India, I can use someone else's GST to claim benefit but that is currently not an option and I lose card points essentially. If anyone has bought this recently, would love your advice. Also I think it's for 1.89L in India and 1.55L in UAE.