Both made by Ethereum CTO and Co founder Gavin Woods. It has been in the works since the 2017 ICO and Polkadot is launching by August. Kusama is out already at a $46 million market cap but will pump i think when Polkadot comes out it is a “sister to polkadot”. The IOUs already place Polkadot at a higher than $1billion market cap
Both are interesting projects to watch. We have the Polkadot score on Token Metrics. Technology is decent, question is whether they can get a large developer community.