Two different bikes for two different purposes.
The Forge is a performance endurance road bike. Built for all-day riding without sacrificing speed. Performance endurance geometry across five sizes (1 to 5), informed by 2,000+ professional bike fits collected over 13 years. More upright riding position, more frame clearance, made to go further.
The Shift 2.0 is an aero race road bike. CFD-modelled tube profiles tested at Silverstone Sports Engineering Hub. T1000 and M40JB carbon construction. UCI approved. Race geometry across five sizes. If your objective is being as fast as possible on the road, start here.
Both share the same fit-led build process and the same standard of finish. The difference is intent.