Nexus 7 tablet is from Google Inc.
iPad Mini belongs to Apple Inc.
Now teh discussions what we have here are not just about the Nexus7 tab with iPad Mini, its with Google Vs Apple.
Nexus 7 Screen resolution: 1280 x 800
iPad Mini Screen resolution: 1024 x 768
Nexus 7 comes power packed with Nvidia Tegra 3 quad-core chip, whereas iPad mini comes with a dual-core A5 processor.
Google Nexus 7 has 1.2 Megpixel Camera, whereas iPad Mini has 1.2 front facing camera as well as 5 Megapixel camera.
Nexus 7 US$249 is much cheaper than iPad Mini US$429, Nexus 7 tablet is much attractive with loads of Free Applications and is considered a tough competitor to iPad Mini.