After comparing Coinbase 50 (top 20) and CMC20, the overall overlap is very high, and the core assets are almost completely consistent. Mainstream varieties such as BTC, ETH, XRP, SOL, DOGE, and ADA occupy the same dominant positions in both indices, and the overall Beta is almost consistent. However, some structural differences can also be seen: COIN50 is constrained by the listing range of Coinbase, leaning more towards "Compliance Blue Chips," with rebalancing done on a quarterly basis, resulting in a more stable asset structure; CMC20, on the other hand, has no exchange restrictions, and its monthly rebalancing makes it easier to incorporate new narrative assets like $HYPE and $SUI , with a style leaning towards "Global Free Flow + Growth Factor."

In simple terms, COIN50 is stable, neutral, and has clear institutional logic; CMC20 is fast, responsive, and better at capturing the elasticity of new assets in the market. The two are 90% aligned, but the differences in pace and style perfectly illustrate the two perspectives of observing the crypto market: the "Compliance Index" and the "Global Market Index."

Data source:
Coinbase50:
CMC20: