In terms of sheer rock 'n' roll greatness, it's tough to surpass the mighty Led Zeppelin. So in this edition of Clash of the Titans, we're giving this legendary band the only fair competition: themselves.

No, we're not doing it by locking occasionally squabbling former mates Robert Plant and Jimmy Page into a room until they can settle their differences and/or deliver a follow-up to 1998's 'Walking into Clarksdale.' We're putting Zeppelin's classic self-titled debut against its rifftastic successor, 'Led Zeppelin II.'

As always, the final decision is down to you, the reader -- although we definitely don't envy the choice you're faced with here. Genre-defining debut or epic follow-up? Either way, you can't really go wrong...but it still seems kind of wrong to pick one over the other.

Perhaps it might help to have a little background information before you cast your ballot. Released Jan. 12, 1969, 'Led Zeppelin' announced the band to the world with a resounding blast that silenced poor reviews and helped solidify the emerging heavy metal movement with classic cuts like 'Good Times Bad Times,' 'Dazed and Confused,' and 'Communication Breakdown.' On Oct. 22 of that very same year, 'Led Zeppelin II' arrived, upping the ante by going to No. 1 in the U.S. and U.K. while gifting AOR stations with a slew of evergreen hits that included 'Whole Lotta Love,' 'Heartbreaker,' and 'Moby Dick.'

So which Zeppelin LP will emerge victorious? Check them both out below, and remember -- you can cast a vote once every hour between now and 11:59PM ET on Jan. 18.

Listen to 'Led Zeppelin'

Listen to 'Led Zeppelin II'

You Think You Know Led Zeppelin?

See the Yearbook Photos of Jimmy Page and Other Rock Stars