They should be good. They cost HBO a fucking lot of money.
are we talking about the UFC countdown or the HBO countdown? Either way, 24/7 is obviously better b/c it's a multi episode series that has a lot of time to dedicate to the fighters and the pre-fight incidents. Compared to the half-hour long or so countdown shows is like comparing an ocean to a pond. Of course the ocean will be more impressive.
The last 2 mins of the first Pac/DLH 24/7 episode is just awesome to watch (the part where the Coldplay music comes on and you see the two fighters training).
Absolutely epic stuff.
EDIT: The song there is called "Life in Technicolor" by Coldplay.