I'm looking at adding an all road type of bike to the arsenal but it seems locally there are only a handful of shops with bikes at the moment and even fewer in my size. Most can still order what I (potentially) need, I think, but I wanted to get an idea of what I should order, sight unseen.

Should I order based on what my current road bike is (for stack/reach) and make some adjustments here and there for fit, or should I consider some other measurement when it comes to gravel bikes? I've read some people mention you should size down for cx/gravel, etc..

What are your thoughts? Slightly taller stack/shorter reach than roadie?

Short list bikes:
Kona Rove NRB
Felt Breed
Spec Diverge
Ridley X-road