ATVs and UTVs have distinct advantages and disadvantages:
All-terrain vehicles, also known as four-wheelers, are smaller and meant for one or two riders. They are also considerably cheaper. ATVs are popular with hunters, racers and people who work in the wilderness.
Utility terrain vehicles, also known as side-by-sides, are larger and meant for carrying multiple people or hauling cargo. UTVs cost more and are also much heavier than ATVs. UTVs are popular with farmers, ranch hands and people looking to drive off-road recreationally.
Which is better for you depends on your intended use. If you’re on a budget or just prefer riding alone, go with an ATV. However, if you want to use your new vehicle for transporting people or gear off-road, a UTV might be a better choice.