Imagine for a second that you won last week's Powerball lottery and now have $600 million to spend on a new ride. You'd like to show off your new-found wealth, and nothing says 'money' like a big, ostentatious four-door luxobarge - but which car do you buy? On this week's episode of Head 2 Head, senior features editor Jonny Lieberman hopes to solve that one-percenter problem by pitting the 2012 Bentley Mulsanne against the range-topping 2013 Mercedes-Benz S65 AMG.

To be fair, the Mercedes-Benz S65 AMG wasn't Lieberman's first choice for this Head 2 Head; he originally wanted to put the Bentley Mulsanne up against the new Rolls-Royce Phantom Series II. Rolls didn't want to play though. As Lieberman puts it, Bentley's British rival was scared. So he got the next best thing, the Teutonic cruise missile that is the S65 AMG.

Aside from the $100,000 price difference between the two contenders, this is actually a pretty fair fight. Both are similarly equipped, and more importantly, pack similar power under the hood. The Bentley is powered by a 6.8-liter twin-turbo V-8 that produces 505 hp and a staggering 752 lb-ft of torque. The Mercedes on the other hand has a 6.0-liter twin-turbo V-12 under the hood, making 621 hp and a whopping 738 lb-ft of twist.

So which car will earn a first-world - and first-place - finish? Find out by watching the latest episode of Head 2 Head below.