According to the rumored specs, both are tipped to rely on MediaTek's quad-core Cortex-A7 SoC, include dual-SIM support and run Android 4.2.1 (skinned, of course).

ENGADGET: Lenovo S920 and S820 leak, could pack Android 4.2.1, quad-core CPUs and dual-SIM slots

Having gotten up close and personal with a working P780 (photos after the break), Sina Weibo user Lisancha added that said phone features dual-SIM with dual-standby, a quad-core MediaTek chipset (likely the Cortex-A7-based MT6589) and a launch date set for the second-half of May.

ENGADGET

There aren't many more details to share beyond what the company mentioned at CES, but that doesn't diminish what could be a best-of-all-worlds processor: the automatic switching between four Cortex-A15 and four Cortex-A7 cores should give it a performance edge over many of its peers while reducing power consumption by up to 70 percent.

ENGADGET

Measuring at 6.93mm thick (instead of the rumored 6.13mm), we're surprised that Oppo didn't set this to be the follow-up to the Finder: sure, it's 0.28mm thicker, but it also aces the latter with a 4.7-inch 720p in-cell display, a 1.2GHz quad-core chip with 1GB RAM (likely MediaTek's Cortex-A7-based MT6589 SoC), Android 4.2 and a sorely missed 3.5mm headphone jack -- so no micro-USB adapter required.

ENGADGET: Oppo's 4.7-inch, 6.93mm-thick R809T pays homage to the Finder

It runs a quad-core Cortex A7 CPU with 1GB of RAM, but curiously we found this larger device to be more sluggish than its dual-core little brother.

ENGADGET: Polaroid shows off M10 tablet for $229, we go hands-on (video)

As a nice touch, Android 4.2 will be common among the bunch, as will backside-illuminated sensors on the cameras and the quad-core, 1.2GHz MediaTek MT6589 (Cortex A7) SoC.

ENGADGET