Surveys
Surveys are direct: answer questions and see whether you qualify. They may be shorter, but disqualifications can happen.
Games
Game offers are more project-like. You may need to install a game, reach a milestone, and wait for SB to credit.
Best Beginner Choice
Try surveys for quick testing and games when you want a longer reward-gaming project.
Try Swagbucks
You can open Swagbucks here.