Explanation of differences between the political and economic changes in Spanish and Portuguese colonies

There were really a lot of differences, but one would be how Spain wanted colonies from the start. They went out to the new lands and made colonies. Portugal, however, only made colonies when he realized other people were starting the eye the land that he had found. For economics, it seems that Spain was the first to do something and then Portugal would try and follow, like the cash crops. Politics were almost the same, but later in the development of the colonies,vs pain had to make viceroys and such to help keep the power in the colonies in check, and Portugal didn't have that.