F-150 is out for 2018 model year, Chevy 1500 out next model year. I'm looking forward to seeing them. Ford has released their numbers and of course the Ram has been out for a while. Chevy hasn't released numbers yet but they say it will outperform the F-150:
Vitals: 2018 Ram EcoDiesel vs. 2018 Ford F-150
Truck: 2018 Ram 1500 EcoDiesel 2018 Ford F-150 Diesel
Engine: 3.0L V-6 EcoDiesel 3.0L V-6 PowerStroke
Power @ RPM: 240 @ 3600 250 @ 3250
Torque @ RPM 420 @ 2000 440 @ 1750
Fuel Economy (CITY / HWY): 21 / 29 TBD / 30
We should know more about the 2019 Silverado diesel and the new Duramax I-6 engine over the next several weeks.