The choice between buying a vehicle with two-wheel drive and one with four-wheel drive depends on what type of driving you do, which often depends on geography. If you’re like us and have to slog through endless Chicago winters of slush, snow and ice, 4WD may be a worthwhile investment. Then again, if you live in Atlanta and rarely see a dirt road — let alone snow — you probably won’t miss it. Today, Ask.cars.com gives you the details on 2WD versus 4WD.