I suggest that you choose ledger nano s because it can support more altcoins and ERC20 than Trezor wallet.
So your ethereum will be secured and safe if you use a ledger nano s and ledger nano has a better style than Trezor wallet.
Just make sure to save your seed phrase on the paper or anywhere you want to save just make sure that it is in the safe place because you can't recover your wallet if you don't know your seed phrase it is one of the important in hardware wallet.
Okay. Thanks for the pieces of information. After you said I read about both Ledger Nano and Trazer wallet. I think I should prefer Ledger nano S than Trezor wallet. Because it supports more Altcoins than Trazer.