Binance seems to be the more preferable, tho coinbase has always been on top, maybe it got something unique, I ain't familiar with coinbase, i prefer Binance because it's user interface is so friendly, maybe that's why people prefer using binance because it's easy to access for both the newbie and the professionals and also Binance  supports P2P which seems to be helpful to many traders and investors especially for people in countries which got strict rules for crypto.