There's probably only one reason why we would recommend the Google Nexus 7 over the Sumvision Cyclone Voyager 27 tablet; the former has a higher display resolution (1,280 x 800 compared to 1,024 x 600). Other than that, the Sumvision model appears to win on all fronts, at least on paper.
It costs less than £100 at Ebuyer, runs on a Rockchip RK3188, a quad-core system-on-chip based on the Cortex-A9 architecture, running at 1.6GHz and with a quad-core Mali 400 GPU. It should in theory be much faster than the Nvidia Tegra 3 that powers the Google Nexus 7.
The rest of the specs is similar to the Asus-manufactured tablet. This includes 1GB of RAM, 16GB onboard storage, Bluetooth, Android 4.2.2 Jelly Bean, a 7in IPS display, Wi-Fi, a mini USB port and a front-facing camera.
The Cyclone Voyager 27 comes with a 3,200mAh battery with up to six hours battery life, a microSD card slot, a mini HDMI one and a rear 2-megapixel camera. All in all, it is a viable alternative to the Google Nexus 7, one which has now been launched for more than a year.
Chances are that both Google and Asus will be launching tablets that will bring down the cost of quad-core devices well under the £100 range.
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