If you asked me to pick two Samsung phones that have been making the most noise (besides the mighty Galaxy S6, of course), the Galaxy A5 and the Galaxy A3 would be my picks, hands-down. The phones have been long talked about, and although the Galaxy A5 is already official in some markets, this is the first time we're seeing the Galaxy A3 in its flesh. Both phones carry the new Samsung design language, which means you're going to get unibody cases and therefore a build that's sturdier (and prettier too, in some cases) than most other Samsung phones. What's more, both these devices carry 64-bit SoCs, something which is fast starting to become standard for mid-range phones.
The Galaxy A5 comes with a 5-inch 720p HD display, and has 2GB of RAM along with 16GB of on-board storage to take care of memory/storage. There's a 13 mega-pixel camera on the rear, and a 5 mega-pixel sensor on the front for the shutterbug in you, with all this being powered by a 2300mAh battery.
The younger sibling, aka the Galaxy A3 features a 4.5-inch 960 x 540p qHD display along with 1GB RAM and 8GB storage. An 8 mega-pixel camera sits on the rear on the Galaxy A3, along with a 5 mega-pixel front. In more aspects than one, the Galaxy A3 is a knocked-down Galaxy A5… and that's why it has only a 1900mAh battery. Both phones, however, are powered by the same 1.2GHz quad-core Snapdragon 410, which has a 64-bit CPU baked in.
The Galaxy A5 and the Galaxy A3 are priced at equivalents of $380 and $287 respectively in Taiwan.