-Actually bitcoin is a block chain technology that runs in POW ( Proof of work) where miners uses hardwares ( ASIC MINER) to solve mathematical problems in order for the system to be secure and decentralize.

-Steem uses complex technologies in order to secure its block chain this includes Capital Contributions which is some what the same as proof of stake and Subjective Contributions which they call Subjective Proof of Work which in the criteria by which work is evaluated is completely subjective and its definition lives outside the source code itself. One community may wish to reward artists, another
poets, and another comedians. Other communities may choose to reward charitable causes or help advance political agendas.