@jjudd, Steem Power is more valuable in the because it increases your upvote strength. Steem Power is a one to one ration with Steem. Steem Power is looked in until powered down. Steem is a tradable token.

Since I have been on Steemit (since June 2017), I had never seen SBD higher than Steem until recently.

I do not know your long term goals, but as long as the SBD to Steem ratio is over 1.5 I plan to take rewards at 50/50.