Original sentence: As of August 2003 it is arguable that the Britannica is being challenged by Wikipedia for the title of "most prestigious" - they have about the same number of words, Wikipedia has more articles (152,000 versus 65,000), and, importantly, Wikipedia is growing in size a lot more quickly than Britannica.Britannica's articles are commonly considered accurate, reliable and well-written.Encyclopædia Britannica is commonly considered the most prestigious encyclopedia in the English language (but see comparison with Wikipedia below).That's not to say that most people think Wikipedia is more prestigious than Britannica, merely that the trend is in that direction
Edited sentence: Encyclopædia Britannica is the most prestigious encyclopedia in the English language.Its articles are commonly considered accurate, reliable and well-written