Racers and fit riders who want Giant's race geometry without Propel's deep tubes.
Giant's lightweight race bike: compact sloping top tube, sharp steering, and a fit that has been a stack/reach reference for a long time. Less aero drama than Propel.
Fast road riders who want Orbea aero. Orca if you care more about weight.
Aero Orbea race bike. Deeper tubes than Orca, same size run so many riders can twin the two on stack/reach.
Racers who want BMC aero without a full time-trial bike.
The aero-leaning Teammachine. Race position with more wind-cheating than SLR. New in the mid-2020s catalog window.
Riders who race or ride fast on rolling and flat roads and are happy with a long, low fit. Not the pick if you want a tall stack.
A deep-section race bike that wants speed. The cockpit is integrated and the front end is stiff; it holds a line in crosswinds better than older Aeroads, but it still feels like an aero bike.