I've been looking into tangem more. I take back my previous statement. Coldcard does not function like them in any way. Tangem does have an interesting take on security and seed generation, though. But, I can't seem to shake the feeling that that level of simplicity for security seems a bit disadvantageous when needing to rely on a mobile app. I've personally never used the Blockstream Green mobile wallet for that very reason. The level of security Coldcard has for its user kind of puts Tangem to shame, tbh.