The one used in SuperNET.
So a variation of PoS most closely defined as a TaPoS variation thus refuting your previous comment of not talking about PoS.
You understand that you don't need to use the term "PoS" to discuss it, right?
Correct, this is the often ignored benefit of PoW which allows for a more equitable distribution of coins vs an ICO or staking. With PoW an asic manufacturer could leapfrog the other manufacturers with more efficient improvements in design and individuals who take risks and or have more streamlined operations can overthrow the existing mining monopolies at any given moment and it has already taken place multiple times within the last 5 years already.
With an ICO like NxT the distribution is mainly determined by the initial ~73 investors who control almost all the coins and with bitcoin the distribution can shift not only by buying the coins directly off early stakeholders but with more efficient means of mining.