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Computerworld - The latest leaked next-generation iPhone, which includes the same processor that powers the iPad, is probably a production or near-production unit, a hardware expert said today.

It's also the best clue yet that Apple isn't about to upstage the iPad with a smartphone that's more powerful, faster and less-expensive than its quick selling tablet.

Earlier this week, A Vietnamese forum published photographs of what it claimed was an iPhone. Several of the images were of the iPhone during and after a teardown, exposing internal components, including the logic board.

The exterior of the Vietnamese iPhone closely resembles the case of an earlier prototype photographed by technology blog Gizmodo, which paid $5,000 for the device. The Gizmodo-obtained iPhone prototype raised a ruckus when it was disclosed by the site last month, with Apple demanding its return and California police involved in an investigation into possible theft charges.

A 21-year-old California man was identified by his lawyer as the person who took the iPhone prototype from a Redwood City, Calif. bar after an Apple software engineer left it behind.

Unlike Gizmodo's iPhone, the one that surfaced in Vietnam is labeled with production markings that identify it as a 16GB model.

When photographs of the Vietnamese iPhone are blown up, markings on the processor closely match those on production models of the iPad, the iFixit Web site noted Wednesday. According to iFixit, the markings mean that the next iPhone will be powered by the Apple-designed A4 SOC (system on a chip), which also runs the iPad.

"That makes sense," said Aaron Vronko, CEO of Portage, Mich.-based Rapid Repair, a repair shop and do-it-yourself parts supplier for consumer devices, including Apple's iPod and iPhone. Vronko regularly tears apart Apple hardware products -- most recently the iPad -- to get an idea of how they're built and what capabilities they have.

"That completely gels with the direction Apple is heading," Vronko added. "They're loathe to make a device and have it less expensive and more powerful than the iPad. So it makes sense that the iPhone will use the same processor, as long as it's not more powerful than the iPad."

When Gizmodo published photos of the iPhone prototype it had acquired, Vronko speculated that Apple would also use the A4 in its next-generation smartphone.

iFixit claimed that the markings on the A4 showed that the fourth-generation iPhone will include 256MB of system memory, the same amount as the iPad and last year's iPhone 3GS.