We've now chosen to spec our bikes with two different groupsets. We've done this at two different price points to allow the customer to choose between the two if they feel they'd benefit from HRD over non-HRD
The main way of determining which is which is from the title of the bike, which will state "HRD" in the title. HRD means Hydraulic Road Disc, which features hydraulic disc brake levers and calipers as opposed to a non-HRD bike, which features mechanical brake levers and brake calipers.
HRD equipped bikes offer brakes which allow greater control and power when braking while featuring the same gearing as non HRD bikes. Non-HRD uses a mechanical braking system, which won't offer the power or feel of a hydraulic system, but will be easier to service as it just requires a cable replacement, rather than a hydraulic system which requires a bleeding for servicing.