Thank you Muiren! That gets me started. Believe it or not - the Roubaix and Ruby are spec'd out almost identically - about the only difference is going to be in the saddle. I currently ride a Oura 155 on my Trek, and the Ruby comes with the Ruby Expert 155 so I presume it will work for me while the Roubaix has something else in a 143.
I can stand to be a little more aggressive than I am in my Domane now, but I still wanted the "comfort" type style for longer rides. I'm considering the Ruby/Rubaix because (and I'm probably doing an awful job of explaining this) because while I love the seat/feel of the Domane, the handlebars seem "stiffer" or I feel more chatter in my hands and I'm wondering if the zertz in the front fork will fix that in the Ruby/Rubaix on longer and rougher rides. I should probably do more test riding before I decide what to get :-) Winter is coming and I'm not doing many long rides in Indiana now anyway so I should probably wait for spring.