Unity is generally better for blockchain game development due to its flexibility, vast asset store, and large developer community. It supports WebGL and mobile platforms, which are crucial for most blockchain games. Additionally, Unity integrates well with popular blockchain SDKs like Moralis and Web3Unity, making smart contract interactions smoother. While Unreal Engine offers superior graphics, it's more suited for high-end AAA games rather than lightweight, decentralized applications. For developers prioritizing accessibility, rapid prototyping, and cross-platform reach, Unity is the go-to engine for efficient blockchain game development (https://maticz.com/blockchain-game-development).