On this episode of Head 2 Head presented by Tire Rack, Jonny Lieberman and Randy Pobst examine two of the highest performing vehicles on sale today, and they’re both called GT-Rs. Or is that GT Rs?

The 2016 Mercedes-AMG GT arrived as the moment when Mercedes stopped treating the sports-car segment as a side project and stepped back into a full-scale fight with the established performance elite.

Which is quicker in the quarter mile between the 992.1-phase 911 GT3 RS and the GT R? The folks at carwow are much obliged to answer that question with a series of drag races, and – rather obviously – ...