Aptos vs. Sui: Comparing New Move-Based Blockchains
Aptos and Sui both draw on the Move technology originally developed for Meta’s Diem project and use Move-based smart contracts, making them part of the same broader category of emerging Layer 1 blockchains. However, they differ significantly in their state models and approaches to parallel execution. Aptos relies on Block-STM to handle transaction conflicts dynamically, while Sui uses an object-centric data model to organize transactions based on object dependencies. Move provides a common foundation, but their execution architectures are key to understanding the differences between Aptos and Sui.
Why Do Aptos and Sui Both Use Move?
Aptos and Sui are both Layer 1 blockchains that support smart contracts. One of their most notable similarities is that both are built around the Move programming language.
Move originated from Meta’s Diem project and was designed with digital asset management in mind. In conventional programming, data can often be copied freely. Move introduces concepts such as resources to prevent certain digital assets from being arbitrarily copied or discarded, while its type system helps control how assets are transferred and stored. However, Move does not automatically eliminate all smart contract risks. Vulnerabilities can still arise from code logic, access controls, oracles, and third-party protocols. More accurately, Move helps reduce certain asset-handling errors at the language level and makes ownership rules more explicit.
Aptos and Sui have since developed Move in different directions. Aptos retains an account- and resource-based model while also introducing mechanisms such as Objects. Sui Move, by contrast, uses an object-centric global storage architecture. As a result, Move code and development models are not fully interchangeable between the two blockchains.
Aptos Block-STM vs. Sui’s Object-Centric Model
One of Aptos’s key technologies is the Block-STM parallel execution engine. In simple terms, Aptos can execute multiple transactions in parallel and then check whether they have conflicting state reads or writes. Transactions without conflicts can be processed simultaneously across multiple CPU cores. When conflicts occur, the affected transactions are re-executed according to a deterministic transaction order. This approach is known as optimistic parallel execution. Developers do not need to declare in advance which states their transactions will access, as the system detects conflicts automatically. The Aptos white paper also describes pipelined architecture for transaction propagation, ordering, execution, and storage to improve hardware utilization.
Sui takes a different approach. Sui organizes an on-chain state into objects with unique IDs and different ownership types. When multiple transactions involve independent objects, the system can more easily identify that they have no dependencies and process them in parallel. Transactions involving shared states require additional coordination mechanisms.
In simple terms, Aptos emphasizes detecting conflicts during execution, while Sui uses its object model to make certain transaction dependencies more explicit at the data structure level.
How Do Aptos and Sui Differ in Their Applications?
Both Aptos and Sui emphasize high transaction throughput and can support DeFi, gaming, payments, NFTs, and other applications requiring frequent on-chain interactions. Neither blockchain is limited to a specific category of applications.
One advantage of Aptos is that Block-STM handles parallel execution transparently for developers. The network also offers features such as Keyless Accounts and Sponsored Transactions to simplify onboarding and reduce barriers to use. Sui’s object model, meanwhile, provides a natural way to represent game assets, NFTs, and other digital objects with independent states, making its data structure particularly intuitive for certain applications.
When comparing the speed of Aptos and Sui, peak TPS figures from controlled testing environments are not enough to determine real-world user experience. Actual performance also depends on transaction types, the frequency of state conflicts, validator configurations, network load, and application design.
Frequently Asked Questions
-
What is the relationship between Aptos and Sui?
They are separate projects, but both have technical roots connected to Meta’s Diem initiative and use their own evolving implementations of Move. -
Why is Move suitable for digital assets?
Move uses resources, ownership rules, and type constraints to model digital assets, helping reduce certain errors involving copying, permissions, and asset management. -
What is Block-STM on Aptos?
Block-STM is an optimistic parallel execution mechanism that processes multiple transactions concurrently and identifies and handles state conflicts. -
Why does Sui emphasize its object model?
Sui represents on-chain assets and state as individual objects, making it easier for the system to identify data dependencies between transactions. -
Are Sui Move and Aptos Move fully compatible?
No. Although both share the Move foundation, they have developed different platform frameworks, storage models, and development approaches.
Mastering the basics is the first step. Follow MGBX Academy to access more cryptocurrency educational resources and market opportunities.
The process for trading on MGBX:
-
Register a trading account and complete the necessary identity verification;
-
Deposit funds and select a trade type;
-
On the cryptocurrency trading page, enter the amount or quantity of the cryptocurrency you wish to purchase;
-
Confirm the order to complete the trade, and check that your assets have increased accordingly.
Further Readings:
Layer 1 Blockchain Investment Landscape