1
Tumblr is leading in Top 1M Sites and The Entire Web.
2
vBulletin is leading in Top 10K Sites and Top 100K Sites.
1
Tumblr has better usage coverage in more websites categories. Including Arts & Entertainment, Adult, Games, Lifestyle and 20 other categories.
2
vBulletin hasn't got a lead over Tumblr in any websites category.
1
Tumblr is leading in most countries, including United States, Canada, United Kingdom, Germany and 145 other countries.
2
vBulletin is leading in Iran, Syrian Arab Republic, Yemen, Mali and one other country.