actually, I would say harder - I have used dumbells and KBs, dumbells are great for some excersizes, KBs are a little more ackward to swing around, and because of that they require the use of a lot of differnt parts of your body. most KB excersizes involve first swinging the bell up from the ground into position, which involves a sort of circular leveraging motion, and then a pressing potion, and then a swing down. the pressing parts are very similar to what you would do with a dumbell (although they may have the added advantage of a larger grip which coulc cause extra work for your wrist) but the swinging parts work your core and back. I have done a lot of dumbell work over the years, including pretty heavy ones. I have very seldom felt that I was struggling to ocntrol them. with kbs, even smaller ones, you feel a lot less on balance and in control, which requires a little more focus and working more muscle groups, I think. I would suggest that, pound for pound, you can probrably work your arms and maybe chest and shoulders with dumbells better, but back and core you will get a better workout with kbs, although I guess it depends on how you work. as an example - I have 10 kilo dumbells that I got long time ago and don't use at all any more, because it is too small to be usefull. I used them for concentration curls and tricep extentions. I also have a 12 kilo kb, which is actually still useful - I swing it from the ground to a position on my shoulder, and then press it above my head. while I can do this with a 16 kilo weight, the 12 still gives me a good workout. I tried doing the Turkish Get-up and gave uip because doing it with a dumbbell was too much of a hassle. Would be much easier with a kettlebell.