Coldcard is definitely a great hardware wallet, their hardware's security is a gamechanger in bitcoin wallets. Coldcard and The Passport Foundation are both great wallets. TPF is built on Coldcard's code.

There is nothing wrong with supporting altcoins. Personally, I will be more than glad to purchase a wallet that offers as much security as ColdCard and also offers altcoins. But still, I like that they only focus on Bitcoin, their message is clear.

By the way, main difference between Trezor and Coldcard is that Coldcard is a superior wallet when it comes to security and features, overall, it is an ideal wallet, both, CC and Passport are great choices!