battery protection circuit - identify discharge current rate that will trigger protection
The Diodes part refers to \$R_{ss,on}\$ as the source-to-source resistance. This would be the sum of the on-state resistances of the two internal MOSFETs.
The DW01, on the other hand, uses two identical external MOSFETs, where each one would have the same on-state resistance, so each individual FET would have \$R_{ds,on}\$ rated to be equal to half of the effective \$R_{ss,on}\$.