So I looked again and it looks like things are still the same - DTR gives you immediate gratification, but FFN gives you more value.
V1
I didn't check the books side by side, but just counting the number of books, it looks like DTR gives you the same books as does FFN. However, for $5 less, you get all of the Challenge magazine articles (48) via FFN.
http://www.rpgnow.com/product/81369/...0-%5BBUNDLE%5D
http://farfuture.net/Contents%20CDRO...rsion%2010.pdf
V2.2
14 books available via DTR, 18 from FFN - for $4 less. Plus you get the 63 Challenge articles if you get the CD from FFN.
http://www.rpgnow.com/product/81450/...2-%5BBUNDLE%5D
http://farfuture.net/Contents%20CDRO...rsion%2022.pdf
Personally, I think the Challenge articles are worth the wait it takes to received the physical CD, to say nothing of the 4 books in 2.2, but at least you have an alternative if you prefer.