What should I buy,Samsung Galaxy S6 or Apple iPhone 6s?

I don't know which one should I choose. I like iPhone because it is popular and everyone use it but in the ranking I searched in google.Samsung Galaxy S6 is the best smartphones and no 1 in ranking. The thing is I don't trust Samsung anymore. I have use one of the Samsung currently and it is so damn slow.Samsung is a really money sucking corporation. They will produce product that eventhough it is slow, they will market it anyway to make profit. I know that we get what we pay but the product must be at least high quality. I use Samsung Galaxy Trend S7560 and it is so damn slow. But iPhone is too expensive. Which one should I choose?

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