Solana is centralized. The network should never go offline/have outages or be vulnerable to bad actors. At best, Bitcoin has the 51% attack problem which would require insane resources and convincing node operators to follow a fork of the network.
The Solana website itself says its decentralized on the frontpage.
from what I can see, the main difference is that solana is proof of steak the way etheream is going. while there is certainly a place for bitcoin's pow consensus, the electricity costs alone preclude it from being a serious contender to visa.
