On the first question, mine was calculated from the wallets of each of the accounts, converted from VESTS to SP one at a time, so there would have been many rounding errors the way I did it. Also, I noticed after posting that I was using an old conversion factor to get from VESTS to SP.

So yeah, a pie chart that is constructed with the numbers in steemworld would definitely be more accurate. I only used these approximations because I already had the chart in place from a previous report.

For the second question, the SteemWorld number is expressed in terms of SBD. But for comparing with STEEM and SP, it needs to be expressed in terms of STEEM debt owed. If the number of SBDs is 13,827,985 and the median price of STEEM is 0.264, then the value in terms of STEEM for the pie chart would need to be (13,827,985 / 0.264 ) = 52,378,731.06 in STEEM debt.

After that conversion from SBD to STEEM, the SteemWorld value is also similar to the pie chart.