I wouldn't even consider a Bitbox. Look how tiny that screen is. The smaller the screen, the easier it is for you to make a mistake.
Bitbox02 is easier to use than trezor safe 3.
I strongly disagree. Look how small that screen is. How are you supposed to read everything you're signing on that tiny screen? You have to scroll through the data, which makes it easier to miss something if it doesn't match. I have the same complaint with Ledger Nano screens, and some of the OneKey screens. They're awful.
If you're plugging a Bitbox directly into your computer, that small screen is even harder to read. I honestly can't imagine who thought that design was a good idea. I can't imagine how anyone thinks a small screen on a hardware wallet is a good idea.
You need to be able to read everything clearly in order to confirm what the device received is identical to what the wallet app sent it. This is going to become even more important in the future as hackers try to figure out how to steal coins.
Also, tapping on two places on a Bitbox instead of having actual buttons is poor design. I get the concept. They were going for a minimalist look, but in actual use, it's kind of obnoxious. Prioritizing form over function is bad design.
Lots of people get sucked into the mentality of buying a cool gadget. Try hard to avoid being that guy.
Can secure element chips be used to prevent supply chain attacks? The Trezor suite app provides authenticity verification for safe 3, but no such function for trezor one.
If you're buying directly from the manufacturer (in this case, Trezor), you're fine. In the entire history of hardware wallets, the only documented case of a supply chain attack that I've seen was where somebody bought a hardware wallet from a third party. If hackers are disassembling hardware wallets to insert their own components, a secure element chip is irrelevant since they'd remove it and swap in their own chip.
It just seems to me like you're itching to buy a new gadget. You said you already own a Trezor, so you've already got what you need. Spend the money on sats instead. Or, if you really want to buy a new hardware wallet, buy something DIY and fully open source, like a SeedSigner.
If I thought your Trezor wasn't a good choice, I'd definitely tell you so. You've got an excellent hardware wallet.