What hardware wallet would you buy for adults in their early 70s: Ledger Nano S or Trezor One?

Good evening fellow Bitcoin aficionados,

My parents want me to set up a hardware wallet for their Bitcoin holdings, and they're both in their 70s, retired, and while they know how to browse the web and use email on their computer, their tech skills are about where you would expect them to be for folks their age.

After eliminating some of what I feel to be more complex hardware wallets for multiple reasons, I have narrowed the choice down to the Ledger Nano S and the Trezor One.

For those of you with friends, parents, etc. in their 70s, what hardware wallet would you set up for them?