Where they actually differ
Start by ignoring what they share. Both are rated to 80% slope. Both use a combination of
360-degree LiDAR and camera vision rather than a single positioning technology, so neither needs a
clear sky view the way a satellite-only mower does. Both skip the boundary wire entirely. If those
were the only figures that mattered, this would be a coin toss.
They differ on four things, and all four are published by the manufacturers.
1. Area per dollar
The Dreame A3 AWD Pro 2500 is rated for 2,500 m² (0.62 acre) at $2,249.99. The Mammotion
LUBA 3 AWD at $2,399.00 is the 1500 variant, rated for 0.37 acre. That is roughly 60% more rated
area for about $150 less. Mammotion does sell 3000 and 5000 variants that cover considerably more
ground, but it does not publish their prices on the product page, so we cannot put a number on that
comparison yet.
2. Cutting width
Dreame states 40 cm (15.8 in). Mammotion does not state a cutting width for the LUBA 3 on its
product page. A wider deck means fewer passes to cover the same lawn, which matters more as area
goes up.
3. Runtime
Mammotion publishes 215 minutes per charge, with a battery up to 15 Ah. Dreame does not publish a
runtime figure for the A3 AWD Pro. This is the one line where Mammotion gives you a number and
Dreame does not.
4. Warranty
Mammotion publishes a 3-year warranty. Dreame's product page states a 3-year warranty in the
product section and a 1-year warranty in the footer of the same page. We have deliberately left the
Dreame warranty cell blank in our table rather than pick whichever figure suits the argument. Until
Dreame resolves that, treat the warranty as an open question and ask before you buy.
Who each one is for
Take the Dreame if your lawn is between a third and two-thirds of an acre, it is
steep, and you want the most rated area and the widest deck for the money. You are accepting an
unpublished runtime and an ambiguous warranty in exchange.
Take the Mammotion if your priority is a documented specification you can hold
the manufacturer to - a stated runtime and an unambiguous 3-year warranty - and your mowing area
fits inside 0.37 acre. If it does not, price the 3000 or 5000 variant before deciding, because at
that point this comparison changes.
The third option
If your steepest section is actually under 45%, neither of these is necessarily the right buy.
The Husqvarna Automower 440 iQ is rated for 2 acres with a 4-year warranty, which is longer than
either model here, though it costs $4,299.99 and is rated to only 45% slope - and 15% at the
boundary. Our comparison table lets you filter on your own
numbers.
What this comparison is not
We have not tested either machine. Every figure above was read on the manufacturer's own product
page on the date shown at the top of this article. Slope and area ratings are manufacturer claims
measured in favorable conditions. Our review method explains
exactly what that means.