In agreement with previous "leaks," the new images seem to show a more svelte design featuring a 4.7-inch display and a side-mounted sleep/wake button. The photos were published by Japanese publication ascii.jp and Korean blog Seeko and were first noticed by GforGames.
The mockups continue to feature a round rear-mounted flash, a departure from the ovular True Tone setup found on the iPhone 5s. Apple is unlikely to abandon the feature so soon after introduction, meaning the mockups could either represent a new, smaller dual-LED unit or could show an older iPhone design.
In terms of overall size, the mockups fit neatly between an iPhone 5s and HTC's One handset, reflecting the expected 4.7-inch display size of the iPhone 6. The HTC device ships with a 5-inch display.
Additionally, the iPhone 5 and 5s's square, chamfered edges give way to a rounded design reminiscent of the first-generation iPhone.
No matter the final industrial design, Apple's iPhone 6 is widely believed to come with a larger display -- likely 4.7 inches, with a 5.5-inch variant possible -- as well as a faster A8 processor.