I know that I'm late to the discussion, but it really wasn't 1 feature that makes me take a second look at the S6. it was really 3 features or spec that did it for me. I'll list them from least to most important.
First and least important is memory or storage sizes. If I'm going to go without a micro SD card then I need more then 32gb of storage.
While the base model might be only 32gb, I should only have to wait a mouth or so for the 64gb model and I don't see that being an issue even in the color that I want. Again, I might have to wait a good month or so, but 64gb in black shouldn't be an issue. (if you are waiting for the 128gb model, then availability and or your color preference might be an issue... I have a feeling that most carriers will not stock the 128gb model in any or most colors)
The new camera. Starting with the S4 I've realized that I take the vast majority of cellphone pics indoors and in low light. I still take plenty of pictures outside and in bright light too, but only when I don't have my dSLR with me.
Samsung was always good with their cameras but starting with the note 4 they began to use faster lens and OIS.
While the HTC One m9 has a good camera, it has a slower lens and no OIS like on the S6. That was a huge deal breaker for me in getting my next toy (I mean phone).
Finally, Samsung pay. While it might be popular in Japan for years, NFC payments have been non existent in America. Even Google wallet today is almost useless as very few retail and food chains offer such NFC payments. Even Apple is having a difficult time implementing apple pay because of the lack of NFC readers and support.
But because Samsung purchased Loop pay, the S6 now offers both magnetic swipe and NFC style of payments. And while this might not be a big deal in some places, in America this is huge. I can have all my cards stored on my phone and then use them in almost every store or restaurant today, and not in a year or two once NFC readers in the states become more popular. This tops what Apple is trying to do because it is almost impossible to get American businesses to implement the readers.
Posted via Android Central App using the all new HTC One (m8)