Google Custom Search Engine is leading in Top 10K Sites, Top 100K Sites and Top 1M Sites.
Google Custom Search Engine has better usage coverage in more websites categories. Including Business & Industry, Internet & Telecom, Computer & Electronics, Shopping and 193 other categories.
Ning is leading in People & Society, Arts & Entertainment, Religion & Spirituality, Music & Audio and 42 other categories.
Google Custom Search Engine is leading in most countries, including United States, India, Japan, Russia and 144 other countries.
Ning is leading in Brazil, Spain, Mexico, Indonesia and 47 other countries.