Don’t know about the Jade but I’ve got an MK4 and I’m happy with it. It has a lot of functionality and is Bitcoin only. You don’t need the cable, you can use one that you already own. The advantage of the $20 cable is that it can’t transfer data, only energy.

They work differently, different security models

https://help.blockstream.com/hc/en-us/articles/9639949755673-How-does-Blockstream-Jade-s-oracle-enforced-PIN-protection-work-#:~:text=Blockstream%20Jade%20uses%20oracle%2Denforced,comes%20with%20several%20key%20benefits.