If by swimming you mean which is better to have more? They both have their features. With Steem dollars, you currently get a 10% APR interest(it could change) for having it.
Steem power gives you more influence and voting rights on Steemit and you get more just for holding long term. Additionally it helps ensure and maintain the long term health and stability of the entire Steemit network. If you ask me, I say Steem power! :D but as i said they all have their characteristics. PS: Difference between Steem, Steem dollars and Steem power is answered above or below :)
One doesn't really need Steem, Steem Power or Steem Dollars to post. But they can earn them from doing so.
If by swimming you mean which is better to have more? They both have their features. With Steem dollars, you currently get a 10% APR interest(it could change) for having it.
Steem power gives you more influence and voting rights on Steemit and you get more just for holding long term. Additionally it helps ensure and maintain the long term health and stability of the entire Steemit network. If you ask me, I say Steem power! :D but as i said they all have their characteristics. PS: Difference between Steem, Steem dollars and Steem power is answered above or below :)