Modernizr is leading in The Entire Web.
jQuery UI is leading in Top 10K Sites, Top 100K Sites and Top 1M Sites.
jQuery UI has better usage coverage in more websites categories. Including Science & Education, Travel & Tourism, Law & Government, E-commerce & Shopping and 9 other categories.
Modernizr is leading in Computers Electronics & Technology, Arts & Entertainment, Health, Food & Drink and 7 other categories.
Modernizr is leading in most countries, including United States, Germany, United Kingdom, Canada and 131 other countries.
jQuery UI is leading in Russia, South Korea, Japan, China and 25 other countries.