Going back to the OP... both. Neither is bigger than the other, but both are huge.
I have a Galaxy S4 on Verizon.
I have three batteries now (by a fluke, though... I bought a separate battery charger via Amazon, but completely forgot that a battery came with it, so I also bought a battery at my local Verizon store, and never bothered to return it). Two are always fully charged, ready to go. I don't usually need to replace the battery. It happens once per week, sometimes less than that. But if I do, I will replace my battery once during a day, or twice depending on how much I'm using the phone. I never reach a point where there isn't a charged battery in my phone, however. I am able to use my phone until I can plug it in, even if it means the battery that's in my phone if I plug it in is the third one. I've seen the wrieless charging things, and I'd frankly rather have an extra battery or two on me. Not being able to swap out the battery is not okay.
In terms of the SD card... my phone has 16gb internal memory. It's basically full (I have, and use, a lot of apps). I also have a 64gb microSD card. It's also basically full (on top of the apps I have stored on it, I also have a lot of music, podcasts, books, pictures, and [short] videos). I have around 80gbs of combined storage and it's nowhere near enough. 128gb
might be enough, but I don't know. I'm not willing to sacrifice that, however. Unless they're willing to give Verizon access to a 128gb capacity S6, not having the ability to increase the storage is a deal-breaker for me.
I love Samsung's Galaxy line. But I hope they realize, sooner rather than later, the mistake they made in removing the microSD card slot and the ability to replace the battery. Samsung is going full Apple. Never go full Apple.
