Topol-M has a single warhead and its counterpart in Chinese ICBM arsenal is DF-31A or DF-31BJ (Topol-M also has both TEL & silo deployments). DF-41 is like RS-24 (3 warheads) and DF-61 probably features some improvements in rockets/body materials/guidance and/or PBV as well, but likely the same diameter for 1st-stage.