The new Echo Buds (2nd Gen) are definitely an improvement. They are lighter, offer more effective ANC and different drivers.
Echo Buds (2nd Gen) Review
Echo Buds 2 Review: Better Buds For Alexa Fans
Echo Buds (2nd Gen) review - SoundGuys
Echo Buds (2nd gen) Review: Alexa in Your Ears - Tech Advisor
Best Buy: Echo Buds (2nd Gen) True Wireless Noise Cancelling In-Ear Headphones with Wireless Charging Case BLACK B085WTWYS4
Echo Buds (2nd Gen) Review
Echo Buds (2nd gen) review: Improved in nearly every way
Echo Buds (2nd Gen) review
Echo Buds 2 review: More for your money - CNET
Echo Buds (2021) review: hard to beat for the price - The Verge
Echo Buds with Active Noise Cancellation (2021 release, 2nd gen), Wired charging case
Echo Buds 2 review: A true low-cost alternative to AirPods Pro