Two Pickups with some similarities, but otherwise different in most aspects such as the starting price, horsepower, fuel economy, ground shadow size, height, and maximum occupancy. First of all, there is a $13,115 difference in the base MSRP. The 2018 Ram 2500 Mega Cab has a higher starting price than the 2018 Honda Ridgeline. Also, the 2018 2500 Mega Cab has bigger and thirstier engine; the 2018 Ridgeline gets 6 more mpg. In addition, not only Ridgeline is significantly smaller, but it's also slightly shorter than the 2500 Mega Cab. And finally, there is a difference in the number of passengers; the Ram 2500 Mega Cab seats one more the Honda Ridgeline. Among similarities is the body structure.