The important (and unfortunate) difference is that this new keyboard breaks apart the ins/del/home/end/pgup/pgdown block. That's a dealbreaker from a developer

The important (and unfortunate) difference is that this new keyboard breaks apart the ins/del/home/end/pgup/pgdown block. That's a dealbreaker from a developer perspective. In fact it's the reason the new Thinkpad I just ordered is not an X1. The X1 is a nicer machine in every other respect, but it has a funky keyboard layout, so I can't use it for development without taking a big productivity hit.