Yes - SP is locked up STEEM that attracts interest and gives determines the weight of your vote.
I gave a high level explanation of the difference between SP and STEEM in a comment a couple of weeks ago,
https://steemit.com/steem/@xtrodinarypilot/usd10-000-in-steem-or-steem-power-please-help-my-wife-says-no-usd10-000-on-her#@nanzo-scoop/re-xtrodinarypilot-usd10-000-in-steem-or-steem-power-please-help-my-wife-says-no-usd10-000-on-her-20170305t231720890z
Hopefully it is useful.
Perfect !! It's a shame that I miss so many great articles. . . So Helpful!
Danke vielmals.
You should write your own article in this topic please.