Should I buy it or not?

Hi, is it worth it to pay £670 (43) for a 64GB Galaxy S6 Edge+ with a free samsung fast charge 5200mAh battery pack. I would be importing it from Spain and it would take upto 10 working days to arrive (from launch date September 3rd). However, many people are saying, "oh the price will depreciate loads". So that makes me think if I should buy the new iPhone which will be £700 in UK. Or should I just buy the 32GB S6 Edge+ which I can get for £560 (2). In my opinion Hong Kong has the best S6 Edge Plus because it is 64GB and has Dual Sim, but I don't know anyone in Hong Kong to post it to me :(

P.S. What is the difference between the Asia and Europe models - G928C and G928F?