Both blenders have the same die-cast metal base, with 1.5 peak HP motor, 5 variable speeds + Pulse and 3 preset recipe programs. The difference is in the accessories. The KSB4027 blender has a 1.7L ribbed plastic jug and includes a tamper and is available in a range of colours. The KSB4026 has a 1.4L glass jug and does not include a tamper and is only available in the specific COTY colours.