Does ShadowCoin have Proof-of-Stake governance?
No, other than the implicit ability of stakeholders to soft fork or maybe hard fork. It doesn't have a voting or budget system like Dash.
Okay so my comparison table is correct with a "No" for the relevant row for ShadowCash, even though it is PoS.
Actually now that I think about it, the ability of stakeholders to hard fork in PoS is pretty clear. That's another way the consensus of PoS is absolutely weaker than PoW.
Yeah that is also the point I made to CoinHoarder today. I added a link to that point to the [1] footnote in the post with the comparison table. Those links will serve as a summary reference for us on the PoS vs. PoW issue.