What is IDEX? IDEX is the first Ethereum based decentralized smart contract exchange to support real-time trading and high transaction throughput. IDEX is the most advanced Ethereum DEX, supporting limit and market orders, gas-free cancels and the ability to fill many trades at once.
Guys this is my personal opinion, idex is much faster, you can adjust the gas fees to min as possible, transaction very fast. Very light compare to etherdelta.