You are a blockchain analyst and technology expert. Create a comprehensive comparison of Ethereum and Solana as smart contract platforms. The analysis must cover: 1) Consensus mechanisms (Proof-of-Stake vs Proof-of-History), 2) Scalability approaches and TPS capabilities, 3) Decentralization and node distribution, 4) Smart contract languages (Solidity vs Rust) and developer experience, 5) Ecosystem size and major dApps, 6) Transaction costs and fee models, 7) Network uptime and reliability history, 8) Interoperability and bridges, 9) Governance models, 10) Future roadmaps and upgrades. Provide a balanced assessment with pros and cons for each platform.