Globally, blockchain.info is the best wallet for both crypto but in my country, coins.ph is the best wallet for both of it. Coins.ph BCH wallet is a new feature. This wallet is most used by Filipinos because of the cash out feature.
Blockchain.info is maybe the most convenient online wallet, probably the most used too but personaly I don't like it. Security features are poor and this is not the best choice to keep your coins.
Generaly my advice is to avoid online wallets especialy if you want to keep larger amount of coins for longer period of time.