While Trezor One and KeepKey are both hardware wallets supporting over 1,000 coins and tokens, they have some differences. In terms of appearance and design, the Trezor One is smaller, which makes it great for portability. KeepKey is bigger and features a larger screen, which is great for displaying long addresses.
Trezor One has two buttons for physically confirming transactions and entering seed words when recovering private keys, and it lacks a display. KeepKey only has one button for users to set up the device and manually confirm transactions.Trezor One uses a PIN and passphrase, while KeepKey uses a PIN and recovery phrase.
And although both hard wallets support a large number of coins and tokens, KeepKey supports thousands more than the Trezor One.