Technically were Apple makes most of its money is with the flash memories. Apple always overcharged them by a great deal. Samsung isn't much different now. The S6 Edge isn't really cheaper and the difference in price between a 32GB and a 128GB model is abstronomic.
This is an interesting article that does a short comparison of the two phones, prices (in British pounds) included:
http://www.ibtimes.co.uk/iphone-6s-vs-samsung-galaxy-s6-which-flagship-smartphone-right-you-1519138