Ever since the McLaren P1 and Ferrari LaFerrari were introduced at the 2013 Geneva Motor Show, we wanted to see a drag race between two. It took more than two years for that to happen. Likewise, gearheads have been clamoring to see a test between the newer McLaren 650S and the Ferrari 488 GTB, but that has yet to happen as of this writing. But how about a drag race between the P1 and 650S? Would that be interesting enough?