poly engine mounts

just wondering since poly mounts are harder wont it transfer vibrations to the entire car?? i got some oem engine mounts and the rubber was slightly harder than original mounts ant it vibrated not much but definetly more than my originals did and some of them where broke in 2 pieces

i get the in between poly mixture, depends how you want it. My mounts are solid and stiff dont feel too much vibration. The others that i poly are soft and are flexible, dont give too much extra vibration.