To IFB or Lucky Fabb?

Two of the best blogging conferences are taking place in New York on the same week in September, but unfortunately they both share one overlapping day. Not sure why (or the purpose of) both conferences falling on the same day but this is definitely stressing me out. Why didn't the IFB people call the Lucky Fabb people and make sure both conferences weren't sharing the same day? So, now the conundrum begins. While I already purchased my IFB tickets for day 1 and 2, I am now contemplating missing day 2 of IFB to attend day 1 of Lucky Fabb (sounds confusing, I'm aware).

What are your thoughts on both conferences? Which are you attending?

To IFB both days? To IFB one day? Lucky Fabb two?

Enlighten me!
Info on:
IFB

Lucky Fabb