Battlestar Galactica BD vs. DVD... what's the difference???

[Captainhawk1]

Today Amazon has as heir gold box deal of the day, BSG: The Complete Series on Blu-Ray for $119.99.

http://www.amazon.com/Battlestar-Gal...H4AZQKGE5VGF9F

I've had this for almost a year now (in fact, I've bee watching it again over the last two weeks) but a friend of mine has the DVD set, doesn't a own a BD player but because is such a good deal is considering getting it and wants to know if there are any differences between the DVD set and the BD set as far special features are concerned.

Since, I don't have the DVD set, I didn't know but I assumed that all of the non-interactive features of DVD set were the same as the ones on the BD set as all of the features on the BD set are in SD. Anyone have any insight on this?

Thanks.

BTW, I will be recommending a BD player and this set regardless, I'm just curious