Truth is this Karen when people talk about XBY being innovative they aren't kidding, there isn't anything to compare Posign to any other system. This isn't POW and it isn't POS (Proof of Stake). Even Raiblocks is more predictable because its ultimately a tweaked POS model with certain risks same as POW...though still a very good improvement over simple POS. https://en.wikipedia.org/wiki/Proof-of-stake Other systems such as DPOS (delegated proof of stake) are a different beast altogether based on only having a few elected nodes sign blocks and has some serious governance flaws I think as a few have power over a system but nothing at stake. So Posign is radically different where all trusted nodes sign a block and Borz has mentioned certain numbers but until we are working on Zoltchain we can only test on the old chain and get a better picture how well Posign works in practice. *Also Vitalik is a bit pissed Crypto Kitties showed up the weakness of ETH in his Twitter rant.