Are you in the market for a new Android smartphone? If you are looking for a device running a close-to-stock Android experience, with the added bonus of the Motorola extras (active display, touchless controls, droid zap), excellent call quality, and constructed out of Kevlar, the Motorola DROID Ultra may be for you. One the other hand if you are looking for a full 1080p display, a quad-core processor, higher quality camera, microSD expansion, and a replaceable battery, you'll probably be more content with the Samsung Galaxy S4.
Both devices are available in the US through Verizon and cost $199.99 with a 2 year contract with the carrier. You can read the full comparison between the Motorola DROID Ultra and the Samsung Galaxy S4 on PhoneArena