The Ford Transit fills up with regular gasoline, while the Mercedes Sprinter only accepts diesel. There are pros and cons to both.
Regular gasoline is easier to come by than diesel. Not all gas stations offer diesel, and it's typically a higher price per gallon than regular.
Using diesel also means using diesel exhaust fluid. So every seven or eight times you fill up the gas tank of your Sprinter, you'll also need to pop the hood and add a couple gallons of DEF.
However, the Sprinter models are typically more fuel efficient than the Ford Transit.
The Transit fuel capacity is 31 gallons, and the Sprinter fuel capacity is 24.5 gallons.
The Sprinters have a 3.0L Turbo Diesel V6 engine, while the Ford Transit has a 3.5L EcoBoost® V6 engine. Driving the Ford Transit feels more like driving an SUV.