Shocking Similarities Sitting side by side, the street-tuned Explorer ST and the off-road-capable Explorer Tremor couldn't look more different. As such, today we wanted to dive into these two hod-rod Explorers to show you how small engineering choices make massive differences in the driving experience and, therefore, give you three reasons you'd want to buy an Explorer ST and three reasons to buy the Explorer Tremor. But it's those off-roading upgrades that make the Explorer Tremor extremely comfortable around the city. ST: RWD or AWD While the Explorer ST is only available with the hotter 3.0L EcoBoost V6, you do get a couple of drivetrain options. Which means you can technically pick up a no-option Tremor for about $4,000 less than a no-option Explorer ST.