Poly is quieter than steel but deforms. You could fill a poly one with concrete for more weight and it wouldn't go oval over time.
I have never had a poly roller, mine have been steel. The larger 36" steel rollers are supposed to weigh 640 and the 48" steel rollers 910. That makes the 36" roller 213lbs per foot, and the 48" 227.5lbs per foot. I have only used water as weight, and I cheat when filling, I run the fill end up on a car ramp then fill till it runs out and put the plug in. Have been doing that for years. And empty before it freezes.I am thinking of getting a lawn roller but I'm not sure which one would be best. I have a John Deere X300 tractor and will be using it on sod and also to compact some loose stone I'm putting in the driveway. Is there any disadvantage to a poly one over steel? Or vice versus? Would stones damage the poly roller? All the small ones, 36", seem to be 400 pounds. The 48" ones anywhere from around 600 to 800 pounds. Do you find the 400 pound ones to be sufficient? Thanks in advance.