Ethereum and Solana: Two distinct evolutionary paths in the Layer-1 race of 2025

The debate of “Is Ethereum or Solana better” often overlooks the profound differences in architecture that these two networks have pursued up to 2025. Ethereum has evolved into a settlement layer for modular rollups, while Solana has accelerated on a monolithic path, focusing maximally on processing throughput.

Ethereum has long abandoned the race of “one-size-fits-all chains”, positioning its foundation as a payment processing infrastructure, while transaction execution takes place on layer-2 rollups — where the final state is posted on the mainnet.

In contrast, Solana goes in the opposite direction, building a unified ledger with slots under one second and proof-of-history (PoH) to organize transactions in the same global chain.

Although both provide a “send and forget” experience for users, the security models and finality of transactions differ significantly. The question in 2026 will no longer be “which chain is faster,” but rather which chain is more efficient in practice — which chain offers less friction, lower costs, and is best suited to the requirements of the application that developers want to build.

Single block speed or final modular calculation

Solana consolidates the entire process — from confirmation to economic finality — in just 400 milliseconds, if the network operates smoothly.

Validators vote using PoH clocks, timestamping before reaching consensus, allowing the network to process in a pipeline without waiting for traditional Byzantine rounds.

Users often see transactions confirmed in just half a second, while the finality is achieved after about 12 seconds.

Jakob Povšič, co-founder of Temporal, said:

“For the majority of users, a transaction is considered confirmed when two-thirds of the validators vote — in less than half a second.”

Ethereum completely separates these steps. Rollups like Arbitrum (250ms per block) or Optimism (2 seconds per block) handle off-chain transactions. Users have “soft finality” as soon as the sequencer accepts the transaction, but economic finality only occurs when the rollup sends the state root to L1 and the dispute period expires.

• Optimistic rollup: requires 7 days for the dispute period before withdrawing to the mainnet.
• ZK rollup: faster withdrawals, only 15 minutes to a few hours thanks to validity proofs (.

Will Papper, co-founder of Syndicate, believes that this delay “is less impactful than imagined:”

“Most instant bridges have accepted operations based on the unfinished state of rollup. For applications that interact less with L1, the speed of L2 is fast enough, while applications that require frequent settlement must trade-off time that Solana does not face.”

Real-world experience: fees, congestion, and risks

Solana has a fixed base fee of 5,000 lamports )~0.0001 USD( for each signature, plus priority fees to bid for a position during congestion.

The weighted stake QoS system helps transactions from large validators to be processed faster, while the local fee market prevents a hot account from congesting the entire network.

Almost every small transaction has a fee of less than 1 cent. When an error occurs, it is systemic — for example, the 4 hour and 46 minute outage on February 6, 2024, due to a software bug that forced validators to restart.

The fees on Ethereum's L2 fluctuate according to the blob market, but after the Dencun upgrade )3/2024( and Pectra )5/2025(, the average “send” cost on major rollups has dropped to just a few cents.

The risks are also localized: when the sequencer of a rollup stops working, only that rollup is affected, not the entire Ethereum network.

Incidents such as Base )9/2023( or Optimism, Starknet )2024–25( illustrate this risk.

Withdrawal window and the reality of capital withdrawal

The 7-day period of the Optimistic rollup exists to ensure that validators have time to submit fraud proofs.

Third-party bridges often “advance liquidity” for users to withdraw immediately in exchange for a small fee.

ZK rollup does not need this stage thanks to valid proof.

Solana does not have the concept of 'withdrawal', as all transactions are recorded directly on L1. Therefore, finality and withdrawal coincide, completing after about 12 seconds. This is simpler, but it also means that the risk is fully concentrated on the validator software and the Solana network.

Competition: Firedancer and Modular Direction

The breakthrough point of Solana lies in Firedancer, an independent client developed by Jump Crypto, with throughput far exceeding the current client )Agave(. Povšič stated that the Solana ecosystem has changed:

“The fundamental difference is the development culture — currently, the core team has shifted towards prioritizing security and reliability.”

Firedancer helps diversify clients, reduce concentration risk, and aims for latency under 150ms.

Ethereum is preparing three upgrades:

• Pectra )5/2025(: increase blob capacity.
• Fusaka )Q4/2025(: deploy PeerDAS – allowing nodes to verify data without needing to download the entire blob.
• Glamsterdam )2026(: adding PBS and inclusion list to the protocol, enhancing censorship resistance.

Papper's assessment:

“Reducing data storage costs is the biggest breakthrough – as it makes every transaction on the rollup cheaper.”

Where should we build?

• High-frequency trading application, market making: Solana excels due to extremely low latency and stake-based QoS.
• Game, on-chain social network: L2 like Arbitrum or Optimism are more suitable, competitive costs, “instant” feeling.
• DeFi and payments: dependent on the frequency of interaction with L1. If low, L2 is completely sufficient; if full network composability is needed, Solana is simpler.

Povšič summary:

“The greatest strength of Solana is not just low fees or speed, but the simplicity of the global state — no need to worry about bridges or fragmented data.”

Conclusion

In 2026, the question is not “Which is faster, Solana or Ethereum?” but rather which model is best suited for the type of application the developer wants to deploy.

Solana bets on the integration of execution - payment - finality within a 400ms slot, while Ethereum pursues a layered approach, optimizing each layer separately - L1 for security, L2 for speed.

Users are concerned about three overall factors: confirmation time, cost, and reliability.

Both ecosystems optimize different aspects of this equation — and the upgrades in 2026 will show whether single-block speed or new modular scalability is the path to the future.

Thạch Sanh