I've never done either, but I think both are an investment (time and money) but they can complement each other. If you don't want to trade with your savings, you can work on signature campaigns, and use the profit to start trading.
I've a friend that likes trading and another that likes to work on signature campaigns. Both are doing extremely well. If you dedicate to it, both can give you profit, the difference I think is that with trading you have to be willing to take some risks with your money.