Everything overall is faster and smoother. I came from am S3 as well. The camera loads fast, but I would say the time from waking the device to taking a pic is still not quite as fast as iPhones. It takes amazing pics, so that helps. I haven't tried to see if lowering the resolution will speed up the process. The gallery still lags a second or two when I go to it from the camera. I wish Samsung would have made the gallery fast3 instead of clunkier. Overall, though, I truly enjoy using the camera and gallery, so what I've mentioned are just minor complaints.
On the phone, I thought I would miss the swipe motion to call or text, but I like the grid better.
Sent from my SAMSUNG-SM-G900A using XDA Premium 4 mobile app