As far as technology, 
Jade uses a new technology called a virtual secure chip, basically breaks your seed up, encrypts part of it and puts in on their server called an oracle. You can create your own oracle if you want. Their oracle does not have the whole seed or the owner. You can keep your own seed words.

BitKey uses multisig, one key on your phone, one on their server, one on the rock device. The one on your phone can be encrypted and saved in your iCloud. You can not keep your own seed words.

I don’t use either so just an observation in tech. 

 👊🙏 

 Bitkey is probably good for the newcomers and noobs 

 That seems to be the target at least for now. Which is great. And needed.