Motorola’s coming smartphone, the Droid HD, has raised its head alongside the most-awaited Droid Bionic in a tipster report with  leaked photos.

The Droid HD, according to reports, is much thinner than the Bionic and is believed to bring the best of Gingerbread on a 4.5-inch display with an amazing 1280x720 screen resolution. The device is also expected to sport an 8MP camera capable of shooting videos in 1080p. Images of the device revealed that the phone has a SIM slot and a MicroSD slot on the left side and a volume rocker and power button on the right.

The device is also rumored to be around 8.5 or 9mm thick. While the Samsung Galaxy S2 is 8.49mm thick, Droid Bionic, which first emerged in January, came with a 0.52-inch thickness and weighed about 5.5 ounces.

A Droid Life report previously said the name Droid HD first appeared on the Web when a photograph was posted on Flickr which had been taken by one. It was also said the Droid HD could also be the Motorola Dinara, which is slated for a winter release.

The report also stated that the device would arrive with a TI OMAP processor, 1GB RAM, a screen larger than Bionic and a lock button on the side.

Previously, the HTC Holiday gained attention when the device’s leaked images were posted by a member of an XDA Developer Forum. The HTC-based smartphone is rumored by GSMArena to sport a 4.5-inch capacitive touchscreen. Other notable features include the Accelerometer sensor for UI auto-rotate, Multi-touch input method and HTC Sense UI.

The device will run on Android 2.3 or Gingerbread juice and will be powered by a 1.2 GHz dual-core processor, Broadcom BCM4330 chipset. The Droid HD will have an 8 MP, 3264x2448 pixels, autofocus, dual-LED flash rear and a front-facing 1.3 MP camera.

The smartphone has an internal memory of 1GB RAM and an additional microSD slot that supports up to 32GB. Other features such as Google Search, Maps, Gmail, YouTube, Calendar, Google Talk and Picasa integration have also been included.

Compared to both the handsets, the Galaxy S2 has a 4.3-inch Super AMOLED Plus capacitive touchscreen with Gorilla Glass display, TouchWiz UI v4.0 and Gyroscope sensor. The device comes with an 8 MP, 3264x2448 pixels, autofocus, LED flash rear and a 2 MP front-facing camera with Geo-tagging, touch focus, face and smile detection and image stabilization.

The Galaxy S2 runs on Android Gingerbread and is powered by a dual-core 1.2GHz ARM Cortex-A9 processor, Mali-400MP GPU, Exynos chipset. Other notable features include NFC support, SNS integration, google Search, Maps, YouTube, Calendar, Google Talk, Picasa integration and Adobe Flash 10.1 support.