Apple iPad is not only the most popular choice in the tablet market but also the most efficiently designed device, according to a recent review of IHS iSuppli on Aug 1.

IHS iSuppli compared the teardown analysis of eight major tablet models and concluded that those who are eager to challenge Apple’s dominance are matchless against the groundbreaking iPad. The eight compared products included Apple iPad (WiFi), Apple iPad (WiFi + 3G), Samsung Galaxy Tab, Motorola XOOM, Apple iPad 2 (WiFi + 3G), RIM Blackberry Playbook, Asus Eee Pad, HP TouchPad.

The result finds iPad to have the most efficient utilization of memory, most usable screen size, and thinnest battery with the longest life.

According to the senior analyst Wayne Lam of IHS, Apple is at an advantage for being able to control both hardware and the OS.

“Since Apple controls both the operating system and hardware design of the iPad, it is able to attain design efficiencies that other tablet manufacturers cannot,” said Lam. “These efficiencies become obvious in areas like the memory and the battery, where Apple maintains advantages in cost, space savings and performance compared with every competitor in the business.”

In contrast, most other tablets have to rely on third party to provide the OS, such as the Android from Google.

“Apple takes a vertically integrated approach to its products, from the operating system to the user interface, to the hardware design, down to the selection of individual parts used in the device,” Lam said. “For example, Apple even uses its own applications processor design in both the iPad and iPad 2. In contrast, Android tablet makers buy those capabilities from the likes of Nvidia, Texas Instruments and Qualcomm. This gives Apple greater control in multiple areas of product development.”

Could the Apple “empire”, which had been setting the trend in the tablet market, continue to supreme over its competitors as iPad 3 is rumored to come out this September? We shall find out soon.