The first one, because it's The Twelves, a group I saw a couple weekends back. They always deliver good mixes, and in this case, it's no different. I imagine this mix is a precursor to their upcoming EP, too bad it won't be a full length, but I'm sure the quality will be so good, we won't mind.
The Twelves - The Twelfth Hour
The second mix is delivered by DJ of DJs, Erol Alkan, who stopped by BBC Radio 6 and dropped some new tracks, some fresh ones and some hyped ones. However you might feel about electronic music, Erol has always been on top of his game in delivering variety and in his mixes.
Erol Alkan BBC Radio 6 Mix 9/19/2009 via
P.S. I'm pretty sure, given the tracklist, that The Twelves mix is actually the mix used for their liveshow. Tracklists in the comments section.