Uniswap v4 and UniswapX are two significant advancements in the Uniswap ecosystem that work together to enhance the swapping experience for users.

Uniswap v4 is a non-custodial, non-upgradeable, and permissionless automated market maker protocol. It allows developers to create custom AMM features directly on top of Uniswap, providing access to deep liquidity and powerful features like concentrated liquidity.

Improving swapping in several ways

On the other hand, UniswapX is a new protocol introduced for trading across AMMs and other liquidity sources. It aims to improve swapping in several ways:

Better prices by aggregating liquidity sources
Gas-free swapping
Protection against MEV (Maximal Extractable Value)
No cost for failed transactions

Together, Uniswap v4 and UniswapX aim to offer a flexible but reliable combination of tokens, pools, and fee tiers to attract liquidity providers for deeper markets. This results in better prices for users by aggregating various liquidity sources. The introduction of these two protocols marks a significant step towards improving the overall swapping experience in the crypto space.