Nextag ROI Optimizer is leading in Top 100K Sites and Top 1M Sites.
Nextag ROI Optimizer has better usage coverage in more websites categories. Including Shopping, Business & Industry, Marketing & Advertising, Clothing and 12 other categories.
PriceGrabber is leading in Computer & Electronics, Computer Hardware, Health, Products & Shopping and 4 other categories.
Nextag ROI Optimizer is leading in most countries, including United States, Germany, United Kingdom, Taiwan and one other country.
PriceGrabber hasn't got a lead over Nextag ROI Optimizer in any country.