Staking and mining both secure blockchain networks — but through completely different mechanisms. One externalizes costs as energy; the other internalizes them as capital at risk. Here's how each system actually works.

Coins and tokens are often used interchangeably, but they're architecturally different things. The distinction has real consequences for issuer risk, smart contract risk, and regulation.

Sidechains and Layer 2s both extend blockchain capacity, but they handle security differently. One inherits it from the base chain. The other brings its own — and that distinction determines what can go wrong.

Both rollup types scale Ethereum by processing transactions off-chain. What differs is the security model — optimistic rollups assume validity and challenge if wrong; ZK-rollups prove validity before posting. That difference determines withdrawal times, trust assumptions, and where each approach sits in its maturity curve.

Polygon and Ethereum aren't really competitors — Polygon was built on top of Ethereum. But 'Polygon' now refers to several different products with meaningfully different security models. Here's how to tell them apart.

Litecoin was forked from Bitcoin's code in 2011. Fourteen years later, they've diverged more than the shared codebase suggests — including a privacy upgrade that's gotten Litecoin delisted from some exchanges.

Solana and Cardano are both pitched as Ethereum alternatives, but they took opposite architectural approaches. Solana optimizes for throughput; Cardano for formal correctness. Here's how the mechanisms actually differ.

Ethereum and Cardano both run programmable blockchains, but they're built on fundamentally different design philosophies. The account model vs EUTXO distinction isn't cosmetic — it changes constraints, composability, and failure modes.

Ethereum and Solana are both smart contract platforms, but they're built around opposite architectural assumptions. Ethereum scales via rollups; Solana bets on a high-performance monolithic L1. Here's how the mechanisms actually differ.

Bitcoin and XRP are often compared because they're both large by market cap. The comparison mostly misses the point. They were designed for different problems and operate on entirely different architectures.

USDT and USDC are both dollar-pegged stablecoins, but their reserve structures, regulatory posture, and failure modes differ meaningfully. Here's the mechanism comparison.

Layer 1 is the base blockchain. Layer 2 builds on top of it, batching transactions off-chain and anchoring results back to L1. The mechanism — rollups, fraud proofs, validity proofs — determines what security guarantees you actually have.