Any Honda snow blower will perform well on concrete or asphalt surfaces. When properly adjusted, two stage snow blowers are perfect for rough or mixed surfaces. Commercial flat roofs need adjustable auger housing track drive models.
The Honda HS720 series single-stage snow blowers use the auger to take in snow at a high rate of speed and force the snow out of the discharge chute.
Honda HSS two-stage snow blowers use their augers to take in the snow and feed it to a high speed impeller (or fan-like device). The impeller actually blows the snow out of the discharge chute. Two-stage snow blowers are able to move larger volumes of snow greater distances than single-stage snow blowers.