Actually both are good wallets but I personally use Ledger Nano S and it's even better because of their new update for their software the "Ledger Live".
You don't have to download each of their chrome app unlike before it is required for bitcoin, eth and altcoins.
I agree. Ledger Nano S seems to be the best option to me. Especially after their latest Ledger Live sw update. Works like a charm!
BUT:
Make sure you NEVER buy a Ledger Nano S or any other hardware wallet from eBay.
Only buy from the Ledger store or from Amazon.
This article might be of help:
https://www.buybitcoinworldwide.com/wallets/ledger-nano-s/Ledger Nano S has a warning on their support page:
Buy from an official Ledger reseller
https://support.ledgerwallet.com/hc/en-us/articles/360002481534-Check-if-device-is-genuineof course it could be risky any way, but what could go wrong if you make a total reset of your hardware wallet?