No, they're not quite the same thing.
The second one really refers to studies that were done specifically on military cohorts or groups. I referred earlier to the NATO countries study. These studies looked at cancer, mortality, and cancer incidence. The reason they were looked at separately is that these were done by different NATO countries on soldiers who had gone to different zones.
The other one is more general: “It is unlikely that Canadian soldiers have been exposed...”. Number 3 is a much broader conclusion. It looks at not just cancer and not just cancer incidence; it's less restrictive than those studies.