I agree with the previous posts about the price of Ledger Nano S. Plus it looks much better in opposite of Trezor.
ledger nano s supports all the erc20 tokens which trezor dont,but these two are secured wallets.
Where did you get the information about ERC20 tokens and trezor? FYI any ERC20 tokens could be stored at the single ethereum address and you can manage them via myetherwallet whatever cold wallet you have.