A blower moves leaves into a pile and a vacuum takes them away. A machine that does both, and mulches as it goes, reduces the volume so a full collection bag holds far more than the leaves would loose. That is the practical difference between a blower and a vacuum blower mulcher. Reading the machine as blower, vacuum or both is the first filter, since the bodies look similar from the front.
Power source decides how long the work can run and where. Petrol at 25.4cc goes anywhere and runs while there is fuel. Corded machines at 3000W and 3200W give constant power at the cost of a lead. Cordless machines go anywhere within a battery, on 10.8V, 20V and 40V platforms.
Voltage on the cordless machines is a rough guide to how much air they move. A 10.8V blower clears a path and a patio. A 40V machine handles a drive and a lawn. The battery platform matters as much as the machine, since it decides what else can share the batteries. Sealey run SV10.8, SV20 and 40V blowers with Draper covering D20 20V on their own platform.
Bare tool or kit follows from what is already owned. A bare body is the cheaper route onto an existing platform, and kits arrive with a 2Ah or 4Ah battery and charger. Air speed and volume are stated per machine. Send the area to 07754288583 on WhatsApp. A 40V body sits above the 20V machines for the same job with more air behind it.