It’s a surprisingly tricky decision, and if you’re going back and forth between the Roomba 705 Max and the iRobot Combo 4020, you’re definitely not alone.The Roomba 705 Max is built for the person who wants dependable, no-fuss vacuuming without extra bells and whistles — think of it as the trusty Honda Civic of robot vacuums. The iRobot Combo 4020, on the other hand, is designed for the curious upgrader who likes the idea of coming home to floors that are both crumb-free and freshly mopped.In this post, we’ll walk through how these two actually perform in real life — from how well they clean carpets and hard floors, to how smart their navigation is, how loud they get, what the app experience is like, and ultimately which one gives you the best bang for your buck. No jargon overload, we promise.Both of these robots come from iRobot, the company that basically invented the mainstream robot vacuum when they launched the original Roomba back in 2002 — so you’re in familiar, well-tested hands either way. The k=Roomba+705+Max&tag=meetsparkles-20">Roomba 705 Max is a vacuum-only model that typically sits in the $250–$300 range and is known for strong suction on carpets and a refreshingly simple setup process. The Report 006834. Filed.